{
 "$schema": "https://orvik.app/api/v1/openapi.json",
 "id": "tools",
 "title": "Orvik free identification keys and calculators",
 "description": "Every free browser tool on orvik.app: 23 filterable identification keys and 5 field calculators. Each key renders all of its entries into the page HTML, so it is readable without JavaScript. Nothing is uploaded and no account is required for any of them.",
 "url": "https://orvik.app/api/v1/tools.json",
 "documentation": "https://orvik.app/api/",
 "generated": "2026-09-17",
 "publisher": {
  "name": "Orvik",
  "legal_name": "Vast Flow, LLP",
  "url": "https://orvik.app/",
  "documentation": "https://orvik.app/api/",
  "contact": "support@orvik.app",
  "compiled_by": {
   "name": "Merey Tleugazin",
   "url": "https://orvik.app/about/",
   "note": "Not a biologist, geologist or veterinarian. The compilation work, the sourcing and the method are his; the taxonomy and the published standards are cited to the bodies that set them."
  }
 },
 "licence": {
  "id": "CC-BY-4.0",
  "name": "Creative Commons Attribution 4.0 International",
  "url": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Orvik (https://orvik.app)",
  "covers": "The compilation: the key structure, the entry list, the trait coding, the joins and every derived column. Use it commercially, modify it, redistribute it; credit Orvik with a link."
 },
 "upstream_sources": [],
 "scope_limits": {
  "no_identification": "No endpoint identifies a specimen. The keys narrow possibilities from traits a reader has observed; they never return a determination, and a filtered list is not an answer.",
  "no_safety_clearance": "Nothing here certifies that anything is safe to eat, touch or handle. The toxicity, mushroom, wild berry, snake and caterpillar keys flag risk and name the poison centre; they do not clear anything.",
  "no_prices": "No market prices, appraisals or valuations. The coin endpoint publishes metal content only, and the spot price is supplied by the caller."
 },
 "not_published": [
  {
   "what": "The competitor app snapshot behind /compare/ and /alternatives/.",
   "why": "The metadata and in-app purchase lists come from the Apple App Store and are Apple's to license, not ours. The positioning is each publisher's own marketing. Republishing either keyless and CC BY would relicense content we do not own and distribute our competitors' copy at our own cost.",
   "instead": "https://orvik.app/compare/"
  },
  {
   "what": "Individual occurrence records — coordinates, dates, observer, photographs.",
   "why": "Orvik holds only aggregate counts and month histograms. The records themselves are the upstream databases' to distribute, and they already do so properly.",
   "instead": "https://www.gbif.org/occurrence/search"
  },
  {
   "what": "Any identification made by the Orvik app, and any user photograph.",
   "why": "None is retained in a form that could be published, and publishing it is not something a user agreed to.",
   "instead": "https://orvik.app/privacy/"
  }
 ],
 "count": 28,
 "key_count": 23,
 "calculator_count": 5,
 "total_key_entries": 749,
 "free": true,
 "account_required": false,
 "uploads_anything": false,
 "groups": [
  "Plants & trees",
  "Insects & spiders",
  "Animals",
  "Birds",
  "Rocks & minerals",
  "Food & foraging",
  "Sky, coast & ground",
  "Collecting"
 ],
 "data": [
  {
   "slug": "plant-toxicity-checker",
   "type": "identification-key",
   "group": "Plants & trees",
   "title": "Is this plant poisonous to dogs or cats?",
   "summary": "Look up 73 plants and see what each one does to a dog, a cat or a horse.",
   "url": "https://orvik.app/tools/plant-toxicity-checker/",
   "markdown": "https://orvik.app/tools/plant-toxicity-checker/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#plant-toxicity-checker",
   "noun": "plants",
   "entry_count": 73,
   "facets": [
    {
     "id": "status",
     "label": "Who it affects",
     "hint": "Pick one or more. Selecting two shows anything matching either.",
     "options": [
      "toxic-dog",
      "toxic-cat",
      "toxic-horse",
      "safe"
     ]
    },
    {
     "id": "severity",
     "label": "How serious",
     "hint": "Severity assumes a normal mouthful, not a whole plant.",
     "options": [
      "mild",
      "serious",
      "fatal",
      "none"
     ]
    },
    {
     "id": "where",
     "label": "Where you found it",
     "hint": null,
     "options": [
      "house",
      "flower",
      "bulb",
      "shrub",
      "vine",
      "wild",
      "edible"
     ]
    },
    {
     "id": "part",
     "label": "Part eaten",
     "hint": null,
     "options": [
      "leaf",
      "flower-part",
      "berry",
      "seed",
      "root",
      "sap"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 55,
   "faq_count": 7,
   "sources": [
    {
     "name": "ASPCA — Toxic and Non-Toxic Plants database",
     "url": "https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants"
    },
    {
     "name": "ASPCA Animal Poison Control Center — (888) 426-4435",
     "url": "https://www.aspca.org/pet-care/animal-poison-control"
    },
    {
     "name": "Pet Poison Helpline — poison list",
     "url": "https://www.petpoisonhelpline.com/poisons/"
    },
    {
     "name": "Merck Veterinary Manual — Overview of Plant Poisoning",
     "url": "https://www.merckvetmanual.com/toxicology/poisonous-plants"
    },
    {
     "name": "UC Statewide IPM Program — plant and pest information",
     "url": "https://ipm.ucanr.edu/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "leaf-identifier",
   "type": "identification-key",
   "group": "Plants & trees",
   "title": "Identify a tree by its leaf",
   "summary": "Arrangement, compound or simple, margin and shape — 43 trees, four questions.",
   "url": "https://orvik.app/tools/leaf-identifier/",
   "markdown": "https://orvik.app/tools/leaf-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#leaf-identifier",
   "noun": "trees",
   "entry_count": 43,
   "facets": [
    {
     "id": "arrange",
     "label": "Arrangement on the twig",
     "hint": "Look at where leaves attach. Opposite trees are a short list — memorise it.",
     "options": [
      "alternate",
      "opposite",
      "whorled",
      "clustered"
     ]
    },
    {
     "id": "type",
     "label": "Simple or compound",
     "hint": "A leaflet has no bud at its base; a leaf does. That is how you tell.",
     "options": [
      "simple",
      "pinnate",
      "bipinnate",
      "palmate-comp",
      "needles",
      "scales"
     ]
    },
    {
     "id": "margin",
     "label": "Edge of the blade",
     "hint": null,
     "options": [
      "entire",
      "toothed",
      "lobed-pinn",
      "lobed-palm",
      "wavy"
     ]
    },
    {
     "id": "shape",
     "label": "Overall shape",
     "hint": null,
     "options": [
      "oval",
      "heart",
      "lance",
      "triangle",
      "fan",
      "mitten"
     ]
    },
    {
     "id": "extra",
     "label": "Other clues",
     "hint": null,
     "options": [
      "milky",
      "aroma",
      "thorns",
      "pale-under",
      "evergreen",
      "fuzzy"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 2,
   "faq_count": 7,
   "sources": [
    {
     "name": "USDA Forest Service — Silvics of North America, Vol. 2: Hardwoods",
     "url": "https://research.fs.usda.gov/treesearch/1548"
    },
    {
     "name": "USDA PLANTS Database",
     "url": "https://plants.usda.gov/"
    },
    {
     "name": "Arbor Day Foundation — tree identification guide",
     "url": "https://www.arborday.org/trees/whattree/"
    },
    {
     "name": "iNaturalist — community identification",
     "url": "https://www.inaturalist.org/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "tree-bark-identifier",
   "type": "identification-key",
   "group": "Plants & trees",
   "title": "Identify a tree by its bark",
   "summary": "Texture, colour and pattern — identify 34 trees with no leaves on them.",
   "url": "https://orvik.app/tools/tree-bark-identifier/",
   "markdown": "https://orvik.app/tools/tree-bark-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#tree-bark-identifier",
   "noun": "trees",
   "entry_count": 34,
   "facets": [
    {
     "id": "texture",
     "label": "Texture",
     "hint": "Look at the trunk at chest height, not at a sapling or a branch.",
     "options": [
      "smooth",
      "shallow",
      "deep",
      "plates",
      "shaggy",
      "papery",
      "warty"
     ]
    },
    {
     "id": "colour",
     "label": "Colour",
     "hint": null,
     "options": [
      "white",
      "grey",
      "brown",
      "dark",
      "red",
      "mottled",
      "green"
     ]
    },
    {
     "id": "pattern",
     "label": "Pattern",
     "hint": null,
     "options": [
      "lenticels",
      "diamond",
      "camo",
      "braided",
      "thorns",
      "burls",
      "none"
     ]
    },
    {
     "id": "other",
     "label": "Other clues",
     "hint": null,
     "options": [
      "aroma",
      "orange-inner",
      "resin",
      "winter-fruit",
      "leaves-held"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 1,
   "faq_count": 7,
   "sources": [
    {
     "name": "USDA Forest Service — Silvics of North America, Vol. 1: Conifers",
     "url": "https://research.fs.usda.gov/treesearch/1547"
    },
    {
     "name": "Wojtech, M. — Bark: A Field Guide to Trees of the Northeast",
     "url": "https://www.upne.com/1584658528.html"
    },
    {
     "name": "Virginia Tech Dendrology fact sheets",
     "url": "https://dendro.cnre.vt.edu/dendrology/factsheets.cfm"
    },
    {
     "name": "Arbor Day Foundation — what tree is that?",
     "url": "https://www.arborday.org/trees/whattree/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "wildflower-identifier",
   "type": "identification-key",
   "group": "Plants & trees",
   "title": "What wildflower is this?",
   "summary": "Petal count, arrangement and habitat narrow 30 wildflowers.",
   "url": "https://orvik.app/tools/wildflower-identifier/",
   "markdown": "https://orvik.app/tools/wildflower-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#wildflower-identifier",
   "noun": "wildflowers",
   "entry_count": 30,
   "facets": [
    {
     "id": "petals",
     "label": "Petal count",
     "hint": "Count on a fully open flower. Fused petals count as the number of lobes.",
     "options": [
      "p3",
      "p4",
      "p5",
      "p6",
      "many",
      "irregular"
     ]
    },
    {
     "id": "colour",
     "label": "Colour",
     "hint": null,
     "options": [
      "yellow",
      "white",
      "pink",
      "blue",
      "orange",
      "green"
     ]
    },
    {
     "id": "shape",
     "label": "How the flowers sit",
     "hint": null,
     "options": [
      "single",
      "spike",
      "umbel",
      "cluster",
      "whorl"
     ]
    },
    {
     "id": "habitat",
     "label": "Where it grows",
     "hint": null,
     "options": [
      "meadow",
      "woods",
      "wet",
      "dry",
      "garden"
     ]
    },
    {
     "id": "season",
     "label": "Season",
     "hint": null,
     "options": [
      "spring",
      "summer",
      "autumn"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 10,
   "faq_count": 7,
   "sources": [
    {
     "name": "USDA PLANTS Database",
     "url": "https://plants.usda.gov/"
    },
    {
     "name": "Lady Bird Johnson Wildflower Center — native plant database",
     "url": "https://www.wildflower.org/plants/"
    },
    {
     "name": "Plantlife — UK wildflower law and identification",
     "url": "https://www.plantlife.org.uk/"
    },
    {
     "name": "iNaturalist — community identification",
     "url": "https://www.inaturalist.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "succulent-identifier",
   "type": "identification-key",
   "group": "Plants & trees",
   "title": "What succulent is this?",
   "summary": "Growth form, leaf shape and flower narrow 28 succulents.",
   "url": "https://orvik.app/tools/succulent-identifier/",
   "markdown": "https://orvik.app/tools/succulent-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#succulent-identifier",
   "noun": "succulents",
   "entry_count": 28,
   "facets": [
    {
     "id": "form",
     "label": "Growth form",
     "hint": null,
     "options": [
      "rosette",
      "upright",
      "trail",
      "clump",
      "ball",
      "stemless"
     ]
    },
    {
     "id": "leaf",
     "label": "Leaves",
     "hint": null,
     "options": [
      "fleshy",
      "pointed",
      "beads",
      "spines",
      "windows",
      "furry"
     ]
    },
    {
     "id": "colour",
     "label": "Colour",
     "hint": null,
     "options": [
      "green",
      "bluegrey",
      "variegated",
      "red"
     ]
    },
    {
     "id": "care",
     "label": "Practicalities",
     "hint": null,
     "options": [
      "hardy",
      "indoor",
      "toxic",
      "safe",
      "easy"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 13,
   "faq_count": 7,
   "sources": [
    {
     "name": "ASPCA — toxic and non-toxic plants",
     "url": "https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants"
    },
    {
     "name": "Cactus and Succulent Society of America",
     "url": "https://cactusandsucculentsociety.org/"
    },
    {
     "name": "RHS — growing cacti and succulents",
     "url": "https://www.rhs.org.uk/plants/types/cacti-succulents"
    },
    {
     "name": "Missouri Botanical Garden — Plant Finder database",
     "url": "https://www.missouribotanicalgarden.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "caterpillar-identifier",
   "type": "identification-key",
   "group": "Insects & spiders",
   "title": "What caterpillar is this?",
   "summary": "Colour, hair, size and host plant narrow 34 caterpillars down in seconds.",
   "url": "https://orvik.app/tools/caterpillar-identifier/",
   "markdown": "https://orvik.app/tools/caterpillar-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#caterpillar-identifier",
   "noun": "caterpillars",
   "entry_count": 34,
   "facets": [
    {
     "id": "texture",
     "label": "Surface",
     "hint": "The single best filter after host plant.",
     "options": [
      "smooth",
      "hairy",
      "tufts",
      "spiny",
      "horn",
      "knobs"
     ]
    },
    {
     "id": "colour",
     "label": "Main colour",
     "hint": null,
     "options": [
      "green",
      "brown",
      "black",
      "yellow",
      "white",
      "striped"
     ]
    },
    {
     "id": "size",
     "label": "Full-grown length",
     "hint": null,
     "options": [
      "s",
      "m",
      "l",
      "xl"
     ]
    },
    {
     "id": "host",
     "label": "What it was on",
     "hint": "If you know the plant, start here.",
     "options": [
      "milkweed",
      "veg",
      "herb",
      "tree",
      "oak",
      "cherry",
      "grass",
      "ground"
     ]
    },
    {
     "id": "sting",
     "label": "Does it sting?",
     "hint": null,
     "options": [
      "harmless",
      "irritant",
      "stings"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 7,
   "faq_count": 7,
   "sources": [
    {
     "name": "Moth Photographers Group — Lepidoptera plates by species",
     "url": "https://mothphotographersgroup.msstate.edu/"
    },
    {
     "name": "University of Florida IFAS — stinging caterpillars of Florida",
     "url": "https://entnemdept.ufl.edu/creatures/misc/stinging_caterpillars.htm"
    },
    {
     "name": "USDA Forest Service — forest insect and disease leaflets",
     "url": "https://www.fs.usda.gov/foresthealth/publications/index.shtml"
    },
    {
     "name": "Wagner, D. — Caterpillars of Eastern North America (Princeton)",
     "url": "https://press.princeton.edu/books/paperback/9780691121444/caterpillars-of-eastern-north-america"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "spider-identifier",
   "type": "identification-key",
   "group": "Insects & spiders",
   "title": "What spider is this?",
   "summary": "Markings, web shape and size narrow 31 common spiders down fast.",
   "url": "https://orvik.app/tools/spider-identifier/",
   "markdown": "https://orvik.app/tools/spider-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#spider-identifier",
   "noun": "spiders",
   "entry_count": 31,
   "facets": [
    {
     "id": "web",
     "label": "The web",
     "hint": "Look before you look at the spider. Web shape splits the families.",
     "options": [
      "orb",
      "funnel",
      "tangle",
      "none",
      "burrow",
      "sac"
     ]
    },
    {
     "id": "marking",
     "label": "Markings",
     "hint": null,
     "options": [
      "hourglass",
      "violin",
      "banded-legs",
      "stripes",
      "chevrons",
      "spots",
      "plain",
      "bright"
     ]
    },
    {
     "id": "size",
     "label": "Body length, legs excluded",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l"
     ]
    },
    {
     "id": "where",
     "label": "Where you found it",
     "hint": null,
     "options": [
      "indoor",
      "basement",
      "garden",
      "ground",
      "water",
      "eaves"
     ]
    },
    {
     "id": "risk",
     "label": "Bite risk",
     "hint": null,
     "options": [
      "harmless",
      "painful",
      "medical"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 4,
   "faq_count": 7,
   "sources": [
    {
     "name": "World Spider Catalog — the taxonomic authority for Araneae",
     "url": "https://wsc.nmbe.ch/"
    },
    {
     "name": "University of California IPM — spiders",
     "url": "https://ipm.ucanr.edu/PMG/PESTNOTES/pn7442.html"
    },
    {
     "name": "Vetter, R. — brown recluse distribution and misdiagnosis research (UC Riverside)",
     "url": "https://spiders.ucr.edu/"
    },
    {
     "name": "CDC NIOSH — venomous spiders",
     "url": "https://www.cdc.gov/niosh/topics/spiders/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "beetle-identifier",
   "type": "identification-key",
   "group": "Insects & spiders",
   "title": "What beetle is this?",
   "summary": "Shape, colour, size and habitat narrow 28 beetles, pests flagged.",
   "url": "https://orvik.app/tools/beetle-identifier/",
   "markdown": "https://orvik.app/tools/beetle-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#beetle-identifier",
   "noun": "beetles",
   "entry_count": 28,
   "facets": [
    {
     "id": "shape",
     "label": "Body shape",
     "hint": null,
     "options": [
      "round",
      "oval",
      "long",
      "flat",
      "bulky",
      "horned"
     ]
    },
    {
     "id": "colour",
     "label": "Colour",
     "hint": null,
     "options": [
      "black",
      "brown",
      "red",
      "metallic",
      "spotted",
      "striped"
     ]
    },
    {
     "id": "size",
     "label": "Length",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l"
     ]
    },
    {
     "id": "where",
     "label": "Where you found it",
     "hint": null,
     "options": [
      "house",
      "pantry",
      "garden",
      "wood",
      "ground",
      "water",
      "light"
     ]
    },
    {
     "id": "concern",
     "label": "Is it a problem?",
     "hint": null,
     "options": [
      "harmless",
      "beneficial",
      "pest",
      "bite"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 6,
   "faq_count": 7,
   "sources": [
    {
     "name": "UF/IFAS Featured Creatures — beetle species accounts",
     "url": "https://entnemdept.ufl.edu/creatures/"
    },
    {
     "name": "EmeraldAshBorer.info — USDA and university outreach on ash borer",
     "url": "https://www.emeraldashborer.info/"
    },
    {
     "name": "University of Kentucky Entomology — household and stored product pests",
     "url": "https://entomology.ca.uky.edu/entfacts"
    },
    {
     "name": "Royal Entomological Society — beetle identification resources",
     "url": "https://www.royensoc.co.uk/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "butterfly-moth-identifier",
   "type": "identification-key",
   "group": "Insects & spiders",
   "title": "Is that a butterfly or a moth, and which one?",
   "summary": "Colour, wingspan and flight time narrow 28 butterflies and moths.",
   "url": "https://orvik.app/tools/butterfly-moth-identifier/",
   "markdown": "https://orvik.app/tools/butterfly-moth-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#butterfly-moth-identifier",
   "noun": "species",
   "entry_count": 28,
   "facets": [
    {
     "id": "group",
     "label": "Group",
     "hint": null,
     "options": [
      "butterfly",
      "moth"
     ]
    },
    {
     "id": "colour",
     "label": "Main colour",
     "hint": null,
     "options": [
      "orange",
      "yellow",
      "white",
      "blue",
      "black",
      "brown",
      "green",
      "pink"
     ]
    },
    {
     "id": "size",
     "label": "Wingspan",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l"
     ]
    },
    {
     "id": "when",
     "label": "When it flies",
     "hint": null,
     "options": [
      "day",
      "dusk",
      "night"
     ]
    },
    {
     "id": "mark",
     "label": "Markings",
     "hint": null,
     "options": [
      "eyespots",
      "bands",
      "spots",
      "tails",
      "plain",
      "clear"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 1,
   "faq_count": 7,
   "sources": [
    {
     "name": "Butterflies and Moths of North America",
     "url": "https://www.butterfliesandmoths.org/"
    },
    {
     "name": "Butterflies and Moths of North America",
     "url": "https://www.butterfliesandmoths.org/"
    },
    {
     "name": "Fabian et al. 2024 — Why flying insects gather at artificial light (Nature Communications)",
     "url": "https://www.nature.com/articles/s41467-024-44785-3"
    },
    {
     "name": "Xerces Society — pollinator conservation",
     "url": "https://www.xerces.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "animal-track-identifier",
   "type": "identification-key",
   "group": "Animals",
   "title": "What animal made this track?",
   "summary": "Count toes, check for claws, measure the print — narrows 36 species fast.",
   "url": "https://orvik.app/tools/animal-track-identifier/",
   "markdown": "https://orvik.app/tools/animal-track-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#animal-track-identifier",
   "noun": "tracks",
   "entry_count": 36,
   "facets": [
    {
     "id": "toes",
     "label": "Toes showing",
     "hint": "Count the front foot. Many animals print a different number front and hind.",
     "options": [
      "t4",
      "t45",
      "t5",
      "cloven",
      "hoof",
      "bird"
     ]
    },
    {
     "id": "claws",
     "label": "Claw marks",
     "hint": "Look just beyond the toe pads. Sharp dots or dashes mean claws.",
     "options": [
      "claws-yes",
      "claws-no",
      "claws-long"
     ]
    },
    {
     "id": "size",
     "label": "Length of the front track",
     "hint": "Measure the pad and toes, not the splay in mud or the melt-out in snow.",
     "options": [
      "xs",
      "s",
      "m",
      "l",
      "xl"
     ]
    },
    {
     "id": "gait",
     "label": "Pattern of the trail",
     "hint": "Step back and look at ten metres of trail, not one print.",
     "options": [
      "walk",
      "bound",
      "hop",
      "waddle",
      "pair"
     ]
    },
    {
     "id": "habitat",
     "label": "Where you found it",
     "hint": null,
     "options": [
      "yard",
      "forest",
      "water",
      "open",
      "snow"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 1,
   "faq_count": 7,
   "sources": [
    {
     "name": "Elbroch, M. — Mammal Tracks & Sign (Stackpole Books)",
     "url": "https://www.penguinrandomhouse.com/books/705310/mammal-tracks-and-sign/"
    },
    {
     "name": "NatureTracking — track and gait reference",
     "url": "https://naturetracking.com/"
    },
    {
     "name": "US Forest Service — wildlife track identification resources",
     "url": "https://www.fs.usda.gov/detail/r6/plants-animals/wildlife/"
    },
    {
     "name": "Old Farmer's Almanac — animal track identification chart",
     "url": "https://www.almanac.com/content/animal-track-identification"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "animal-scat-identifier",
   "type": "identification-key",
   "group": "Animals",
   "title": "Whose droppings are these?",
   "summary": "Shape, size, contents and location narrow 30 animals down to a shortlist.",
   "url": "https://orvik.app/tools/animal-scat-identifier/",
   "markdown": "https://orvik.app/tools/animal-scat-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#animal-scat-identifier",
   "noun": "animals",
   "entry_count": 30,
   "facets": [
    {
     "id": "shape",
     "label": "Shape",
     "hint": "The strongest single character. Look at an intact piece, not a trampled one.",
     "options": [
      "round-pellet",
      "oval-pellet",
      "tapered",
      "blunt",
      "segment",
      "loose",
      "grain"
     ]
    },
    {
     "id": "size",
     "label": "Size of one piece",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l",
      "xl"
     ]
    },
    {
     "id": "content",
     "label": "What is in it",
     "hint": "Break a dry piece apart with a stick, never with fingers.",
     "options": [
      "hair",
      "seed",
      "plant",
      "insect",
      "shell",
      "uniform"
     ]
    },
    {
     "id": "where",
     "label": "Where you found it",
     "hint": null,
     "options": [
      "trail",
      "latrine",
      "lawn",
      "indoor",
      "water",
      "raised"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 5,
   "faq_count": 7,
   "sources": [
    {
     "name": "CDC — Baylisascaris infection and raccoon latrines",
     "url": "https://www.cdc.gov/baylisascaris/"
    },
    {
     "name": "CDC — Cleaning up after rodents (hantavirus)",
     "url": "https://www.cdc.gov/rodents/cleaning/"
    },
    {
     "name": "CDC — Histoplasmosis and bat guano",
     "url": "https://www.cdc.gov/fungal/diseases/histoplasmosis/"
    },
    {
     "name": "Elbroch, M. — Mammal Tracks & Sign",
     "url": "https://www.penguinrandomhouse.com/books/705310/mammal-tracks-and-sign/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "snake-identifier",
   "type": "identification-key",
   "group": "Animals",
   "title": "What snake did I just see?",
   "summary": "Pattern, size and region — 28 US snakes, venomous ones flagged.",
   "url": "https://orvik.app/tools/snake-identifier/",
   "markdown": "https://orvik.app/tools/snake-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#snake-identifier",
   "noun": "snakes",
   "entry_count": 28,
   "facets": [
    {
     "id": "pattern",
     "label": "Pattern",
     "hint": null,
     "options": [
      "plain",
      "stripes",
      "blotches",
      "bands",
      "diamond",
      "hourglass",
      "speckle"
     ]
    },
    {
     "id": "venom",
     "label": "Venom",
     "hint": null,
     "options": [
      "venomous",
      "harmless"
     ]
    },
    {
     "id": "size",
     "label": "Adult length",
     "hint": null,
     "options": [
      "s",
      "m",
      "l",
      "xl"
     ]
    },
    {
     "id": "region",
     "label": "Where you are",
     "hint": null,
     "options": [
      "ne",
      "se",
      "mw",
      "sw",
      "west"
     ]
    },
    {
     "id": "where",
     "label": "Habitat",
     "hint": null,
     "options": [
      "water",
      "woods",
      "open",
      "yard",
      "rocky"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 12,
   "faq_count": 7,
   "sources": [
    {
     "name": "CDC — venomous snakes and first aid",
     "url": "https://www.cdc.gov/niosh/topics/snakes/"
    },
    {
     "name": "American College of Medical Toxicology — snakebite management",
     "url": "https://www.acmt.net/"
    },
    {
     "name": "Amphibians and Reptiles of North America — species accounts",
     "url": "https://amphibiaweb.org/"
    },
    {
     "name": "US Fish and Wildlife Service — protected reptile species",
     "url": "https://www.fws.gov/species"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "bird-egg-identifier",
   "type": "identification-key",
   "group": "Birds",
   "title": "Whose egg is this?",
   "summary": "Colour, markings, size and nest site narrow 34 birds by their eggs.",
   "url": "https://orvik.app/tools/bird-egg-identifier/",
   "markdown": "https://orvik.app/tools/bird-egg-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#bird-egg-identifier",
   "noun": "birds",
   "entry_count": 34,
   "facets": [
    {
     "id": "colour",
     "label": "Ground colour",
     "hint": null,
     "options": [
      "white",
      "blue",
      "buff",
      "olive",
      "grey"
     ]
    },
    {
     "id": "marks",
     "label": "Markings",
     "hint": null,
     "options": [
      "plain",
      "speckles",
      "blotches",
      "wreath",
      "scrawl"
     ]
    },
    {
     "id": "size",
     "label": "Length of the egg",
     "hint": "Long axis. A US quarter is 24 mm across; a UK 10p is 24.5 mm.",
     "options": [
      "xs",
      "s",
      "m",
      "l",
      "xl"
     ]
    },
    {
     "id": "nest",
     "label": "Where the nest was",
     "hint": null,
     "options": [
      "cup-shrub",
      "cavity",
      "ground",
      "building",
      "water",
      "burrow",
      "none"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 3,
   "faq_count": 7,
   "sources": [
    {
     "name": "US Fish and Wildlife Service — Migratory Bird Treaty Act protected species list",
     "url": "https://www.fws.gov/law/migratory-bird-treaty-act-1918"
    },
    {
     "name": "Cornell Lab of Ornithology — All About Birds species accounts",
     "url": "https://www.allaboutbirds.org/"
    },
    {
     "name": "NestWatch — nest and egg identification",
     "url": "https://nestwatch.org/"
    },
    {
     "name": "NestWatch — general nest and egg information",
     "url": "https://nestwatch.org/learn/general-bird-nest-info/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "feather-identifier",
   "type": "identification-key",
   "group": "Birds",
   "title": "Which bird did this feather come from?",
   "summary": "Size, pattern and shape narrow 26 birds from a single feather.",
   "url": "https://orvik.app/tools/feather-identifier/",
   "markdown": "https://orvik.app/tools/feather-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#feather-identifier",
   "noun": "birds",
   "entry_count": 26,
   "facets": [
    {
     "id": "type",
     "label": "What kind of feather",
     "hint": "Look at the shaft position and the base.",
     "options": [
      "flight",
      "tail",
      "body",
      "down"
     ]
    },
    {
     "id": "length",
     "label": "Length",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l",
      "xl"
     ]
    },
    {
     "id": "pattern",
     "label": "Pattern",
     "hint": null,
     "options": [
      "plain",
      "barred",
      "tipped",
      "streaked",
      "iridescent",
      "mottled"
     ]
    },
    {
     "id": "colour",
     "label": "Main colour",
     "hint": null,
     "options": [
      "brown",
      "grey",
      "black",
      "white",
      "blue",
      "red"
     ]
    },
    {
     "id": "where",
     "label": "Where you found it",
     "hint": null,
     "options": [
      "yard",
      "woods",
      "water",
      "open",
      "pile"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 5,
   "faq_count": 7,
   "sources": [
    {
     "name": "US Fish and Wildlife Service — The Feather Atlas",
     "url": "https://www.fws.gov/lab/featheratlas/"
    },
    {
     "name": "USFWS — Migratory Bird Treaty Act protected species",
     "url": "https://www.fws.gov/law/migratory-bird-treaty-act-1918"
    },
    {
     "name": "Smithsonian Feather Identification Lab",
     "url": "https://www.si.edu/spotlight/feather-forensics"
    },
    {
     "name": "Cornell Lab of Ornithology — All About Birds",
     "url": "https://www.allaboutbirds.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "rock-identifier",
   "type": "identification-key",
   "group": "Rocks & minerals",
   "title": "What kind of rock is this?",
   "summary": "Grain size, layering and three kitchen tests narrow 33 common rocks.",
   "url": "https://orvik.app/tools/rock-identifier/",
   "markdown": "https://orvik.app/tools/rock-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#rock-identifier",
   "noun": "rocks",
   "entry_count": 33,
   "facets": [
    {
     "id": "family",
     "label": "Rock family",
     "hint": "Leave this blank if you do not know — the other filters will tell you.",
     "options": [
      "igneous",
      "sedimentary",
      "metamorphic"
     ]
    },
    {
     "id": "grain",
     "label": "Grain",
     "hint": "Use a hand lens or a phone camera at maximum zoom on a broken face.",
     "options": [
      "glassy",
      "fine",
      "sandy",
      "coarse",
      "pebbles",
      "vesicles"
     ]
    },
    {
     "id": "structure",
     "label": "Structure",
     "hint": null,
     "options": [
      "massive",
      "layers",
      "banded",
      "splits",
      "sparkle",
      "fossils"
     ]
    },
    {
     "id": "hardness",
     "label": "Scratch test",
     "hint": "Scratch a fresh face, then rub the powder away to check the mark is real.",
     "options": [
      "nail",
      "coin",
      "knife",
      "glass"
     ]
    },
    {
     "id": "test",
     "label": "Other tests",
     "hint": null,
     "options": [
      "fizz",
      "heavy",
      "light",
      "magnet",
      "smell",
      "sharp"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 2,
   "faq_count": 7,
   "sources": [
    {
     "name": "US Geological Survey — rocks and minerals information",
     "url": "https://www.usgs.gov/science/science-explorer/geology"
    },
    {
     "name": "Macrostrat — bedrock geology by location",
     "url": "https://macrostrat.org/map"
    },
    {
     "name": "Mindat — rock and mineral database",
     "url": "https://www.mindat.org/"
    },
    {
     "name": "Geological Society of America — rock classification resources",
     "url": "https://www.geosociety.org/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "mineral-identifier",
   "type": "identification-key",
   "group": "Rocks & minerals",
   "title": "Which mineral is this?",
   "summary": "Streak, lustre, hardness and cleavage — the real determinative key, for 36 minerals.",
   "url": "https://orvik.app/tools/mineral-identifier/",
   "markdown": "https://orvik.app/tools/mineral-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#mineral-identifier",
   "noun": "minerals",
   "entry_count": 36,
   "facets": [
    {
     "id": "lustre",
     "label": "Lustre",
     "hint": "Metallic or not is the first and biggest split in every mineral key.",
     "options": [
      "metallic",
      "vitreous",
      "pearly",
      "dull",
      "greasy",
      "adamantine"
     ]
    },
    {
     "id": "streak",
     "label": "Streak on unglazed tile",
     "hint": "The colour of the powder. Rub hard on the back of a bathroom tile.",
     "options": [
      "white",
      "black",
      "red",
      "brown",
      "green",
      "blue",
      "yellow"
     ]
    },
    {
     "id": "hardness",
     "label": "Hardness",
     "hint": null,
     "options": [
      "h1",
      "h3",
      "h5",
      "h6",
      "h8"
     ]
    },
    {
     "id": "break",
     "label": "How it breaks",
     "hint": null,
     "options": [
      "cubic",
      "rhomb",
      "sheets",
      "two",
      "conchoidal",
      "uneven"
     ]
    },
    {
     "id": "extra",
     "label": "Anything else",
     "hint": null,
     "options": [
      "fizz",
      "magnet",
      "heavy",
      "salty",
      "smell",
      "glow"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 2,
   "faq_count": 7,
   "sources": [
    {
     "name": "Mindat — mineral database and locality data",
     "url": "https://www.mindat.org/"
    },
    {
     "name": "Mineralogical Society of America — Handbook of Mineralogy",
     "url": "https://handbookofmineralogy.org/"
    },
    {
     "name": "US Geological Survey — mineral resources",
     "url": "https://www.usgs.gov/programs/mineral-resources-program"
    },
    {
     "name": "Dana's System of Mineralogy classification",
     "url": "https://www.mindat.org/dana.php"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "gemstone-identifier",
   "type": "identification-key",
   "group": "Rocks & minerals",
   "title": "What gemstone is this?",
   "summary": "Colour, hardness and optical effect — 27 gems, with the fakes named.",
   "url": "https://orvik.app/tools/gemstone-identifier/",
   "markdown": "https://orvik.app/tools/gemstone-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#gemstone-identifier",
   "noun": "gemstones",
   "entry_count": 27,
   "facets": [
    {
     "id": "colour",
     "label": "Colour",
     "hint": null,
     "options": [
      "red",
      "blue",
      "green",
      "yellow",
      "purple",
      "colourless",
      "black",
      "multi"
     ]
    },
    {
     "id": "hardness",
     "label": "Hardness",
     "hint": "Test on an unpolished spot such as the girdle, never a facet.",
     "options": [
      "soft",
      "mid",
      "hard",
      "top"
     ]
    },
    {
     "id": "clarity",
     "label": "Transparency",
     "hint": null,
     "options": [
      "clear",
      "translucent",
      "opaque"
     ]
    },
    {
     "id": "effect",
     "label": "Optical effect",
     "hint": null,
     "options": [
      "none",
      "star",
      "eye",
      "play",
      "sheen",
      "change"
     ]
    },
    {
     "id": "kind",
     "label": "Category",
     "hint": null,
     "options": [
      "gem",
      "organic",
      "sim"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 5,
   "faq_count": 7,
   "sources": [
    {
     "name": "GIA Gem Encyclopedia",
     "url": "https://www.gia.edu/gem-encyclopedia"
    },
    {
     "name": "US Federal Trade Commission — business guidance, including the Jewelry Guides",
     "url": "https://www.ftc.gov/business-guidance"
    },
    {
     "name": "Mindat — gem mineral data",
     "url": "https://www.mindat.org/"
    },
    {
     "name": "Gem-A, the Gemmological Association of Great Britain",
     "url": "https://gem-a.com/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "fossil-identifier",
   "type": "identification-key",
   "group": "Rocks & minerals",
   "title": "What fossil is this?",
   "summary": "Shape, size and host rock narrow 26 common fossils.",
   "url": "https://orvik.app/tools/fossil-identifier/",
   "markdown": "https://orvik.app/tools/fossil-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#fossil-identifier",
   "noun": "fossils",
   "entry_count": 26,
   "facets": [
    {
     "id": "shape",
     "label": "Shape",
     "hint": null,
     "options": [
      "coil",
      "cone",
      "twohalves",
      "disc",
      "segments",
      "branch",
      "tooth",
      "plant",
      "trace"
     ]
    },
    {
     "id": "size",
     "label": "Size",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l"
     ]
    },
    {
     "id": "rock",
     "label": "Rock it is in",
     "hint": null,
     "options": [
      "limestone",
      "shale",
      "sandstone",
      "chalk",
      "chert",
      "loose"
     ]
    },
    {
     "id": "age",
     "label": "Age",
     "hint": null,
     "options": [
      "paleo",
      "meso",
      "ceno"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 2,
   "faq_count": 7,
   "sources": [
    {
     "name": "US Bureau of Land Management — fossil collecting on public lands",
     "url": "https://www.blm.gov/programs/cultural-heritage-and-paleontology"
    },
    {
     "name": "Paleobiology Database",
     "url": "https://paleobiodb.org/"
    },
    {
     "name": "Natural History Museum, London — fossil identification",
     "url": "https://www.nhm.ac.uk/discover.html"
    },
    {
     "name": "Jurassic Coast Trust — West Dorset Fossil Collecting Code",
     "url": "https://jurassiccoast.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "wild-berry-identifier",
   "type": "identification-key",
   "group": "Food & foraging",
   "title": "What berry is this, and can you eat it?",
   "summary": "Colour, growth habit and habitat — 30 wild berries, toxic ones flagged.",
   "url": "https://orvik.app/tools/wild-berry-identifier/",
   "markdown": "https://orvik.app/tools/wild-berry-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#wild-berry-identifier",
   "noun": "berries",
   "entry_count": 30,
   "facets": [
    {
     "id": "edible",
     "label": "Edibility",
     "hint": null,
     "options": [
      "edible",
      "caution",
      "toxic"
     ]
    },
    {
     "id": "colour",
     "label": "Colour",
     "hint": null,
     "options": [
      "red",
      "black",
      "blue",
      "white",
      "orange"
     ]
    },
    {
     "id": "habit",
     "label": "What it grows on",
     "hint": null,
     "options": [
      "cane",
      "shrub",
      "tree",
      "vine",
      "herb"
     ]
    },
    {
     "id": "cluster",
     "label": "How the fruit sits",
     "hint": null,
     "options": [
      "single",
      "flat",
      "spike",
      "bunch",
      "aggregate"
     ]
    },
    {
     "id": "where",
     "label": "Where",
     "hint": null,
     "options": [
      "edge",
      "woods",
      "open",
      "yard",
      "waste"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 22,
   "faq_count": 7,
   "sources": [
    {
     "name": "America's Poison Centers — (800) 222-1222",
     "url": "https://poisonhelp.org/"
    },
    {
     "name": "North Carolina Extension Gardener Plant Toolbox — poisonous plants",
     "url": "https://plants.ces.ncsu.edu/"
    },
    {
     "name": "Royal Horticultural Society — potentially harmful garden plants",
     "url": "https://www.rhs.org.uk/prevention-protection/potentially-harmful-garden-plants"
    },
    {
     "name": "USDA PLANTS Database",
     "url": "https://plants.usda.gov/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "mushroom-identifier",
   "type": "identification-key",
   "group": "Food & foraging",
   "title": "What mushroom is this?",
   "summary": "Cap, underside, spore print and substrate — 28 fungi, deadly ones flagged.",
   "url": "https://orvik.app/tools/mushroom-identifier/",
   "markdown": "https://orvik.app/tools/mushroom-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#mushroom-identifier",
   "noun": "mushrooms",
   "entry_count": 28,
   "facets": [
    {
     "id": "under",
     "label": "Underside of the cap",
     "hint": "The first cut in every mushroom key.",
     "options": [
      "gills",
      "pores",
      "teeth",
      "ridges",
      "smooth"
     ]
    },
    {
     "id": "spore",
     "label": "Spore print colour",
     "hint": "Cap on paper, covered, for a few hours. It is the single most useful test there is.",
     "options": [
      "sp-white",
      "sp-pink",
      "sp-brown",
      "sp-black",
      "sp-none"
     ]
    },
    {
     "id": "stem",
     "label": "Stem features",
     "hint": null,
     "options": [
      "ring",
      "volva",
      "bare",
      "nostem",
      "hollow"
     ]
    },
    {
     "id": "substrate",
     "label": "Growing on",
     "hint": null,
     "options": [
      "ground-wood",
      "grass",
      "wood",
      "tree",
      "dung"
     ]
    },
    {
     "id": "risk",
     "label": "Risk",
     "hint": null,
     "options": [
      "deadly",
      "toxic",
      "edible",
      "inedible"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 23,
   "faq_count": 7,
   "sources": [
    {
     "name": "North American Mycological Association — local clubs and poisoning case registry",
     "url": "https://namyco.org/"
    },
    {
     "name": "America's Poison Centers — (800) 222-1222",
     "url": "https://poisonhelp.org/"
    },
    {
     "name": "British Mycological Society",
     "url": "https://www.britmycolsoc.org.uk/"
    },
    {
     "name": "CDC MMWR — Amanita phalloides poisoning outbreak reports",
     "url": "https://www.cdc.gov/mmwr/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "cloud-identifier",
   "type": "identification-key",
   "group": "Sky, coast & ground",
   "title": "What cloud is that?",
   "summary": "Height, shape and cover name 29 cloud types — and what each one forecasts.",
   "url": "https://orvik.app/tools/cloud-identifier/",
   "markdown": "https://orvik.app/tools/cloud-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#cloud-identifier",
   "noun": "clouds",
   "entry_count": 29,
   "facets": [
    {
     "id": "level",
     "label": "Height",
     "hint": "High clouds are ice and look white and thin; low clouds are water and look grey and solid.",
     "options": [
      "high",
      "mid",
      "low",
      "vertical",
      "ground"
     ]
    },
    {
     "id": "shape",
     "label": "Shape",
     "hint": null,
     "options": [
      "heap",
      "sheet",
      "wispy",
      "patches",
      "tower",
      "lens",
      "ragged"
     ]
    },
    {
     "id": "sun",
     "label": "Can you see the sun through it?",
     "hint": null,
     "options": [
      "clear",
      "halo",
      "dim",
      "hidden"
     ]
    },
    {
     "id": "weather",
     "label": "What it means",
     "hint": null,
     "options": [
      "fair",
      "change",
      "rain",
      "storm",
      "wind"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 5,
   "faq_count": 7,
   "sources": [
    {
     "name": "WMO International Cloud Atlas",
     "url": "https://cloudatlas.wmo.int/"
    },
    {
     "name": "WMO International Cloud Atlas — the genera, in full",
     "url": "https://cloudatlas.wmo.int/en/clouds-genera.html"
    },
    {
     "name": "NWS — lightning safety",
     "url": "https://www.weather.gov/safety/lightning"
    },
    {
     "name": "Cloud Appreciation Society — cloud identification",
     "url": "https://cloudappreciationsociety.org/the-clouds/"
    }
   ],
   "updated": "2026-09-03"
  },
  {
   "slug": "seashell-identifier",
   "type": "identification-key",
   "group": "Sky, coast & ground",
   "title": "What shell did I find on the beach?",
   "summary": "Shape, size and which coast — 29 shells people actually pick up.",
   "url": "https://orvik.app/tools/seashell-identifier/",
   "markdown": "https://orvik.app/tools/seashell-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#seashell-identifier",
   "noun": "shells",
   "entry_count": 29,
   "facets": [
    {
     "id": "form",
     "label": "Basic form",
     "hint": null,
     "options": [
      "spiral",
      "cone",
      "bivalve-fan",
      "bivalve-oval",
      "flat",
      "odd"
     ]
    },
    {
     "id": "size",
     "label": "Size",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l"
     ]
    },
    {
     "id": "surface",
     "label": "Surface",
     "hint": null,
     "options": [
      "ribs",
      "smooth",
      "spines",
      "pattern",
      "pearly",
      "holes"
     ]
    },
    {
     "id": "coast",
     "label": "Coast",
     "hint": null,
     "options": [
      "atl-n",
      "atl-s",
      "gulf",
      "pac",
      "eur"
     ]
    }
   ],
   "has_safety_banner": false,
   "risk_flagged_entries": 4,
   "faq_count": 7,
   "sources": [
    {
     "name": "Smithsonian National Museum of Natural History — invertebrate zoology",
     "url": "https://naturalhistory.si.edu/research/invertebrate-zoology"
    },
    {
     "name": "Bailey-Matthews National Shell Museum, Sanibel",
     "url": "https://www.shellmuseum.org/"
    },
    {
     "name": "NOAA — beachcombing and coastal collecting guidance",
     "url": "https://oceanservice.noaa.gov/"
    },
    {
     "name": "Marine Conservation Society — UK shore identification",
     "url": "https://www.mcsuk.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "arrowhead-identifier",
   "type": "identification-key",
   "group": "Collecting",
   "title": "What kind of arrowhead did I find?",
   "summary": "Outline, notching and size place 28 North American point types.",
   "url": "https://orvik.app/tools/arrowhead-identifier/",
   "markdown": "https://orvik.app/tools/arrowhead-identifier/index.md",
   "entries": "https://orvik.app/api/v1/key-entries.json#arrowhead-identifier",
   "noun": "point types",
   "entry_count": 28,
   "facets": [
    {
     "id": "base",
     "label": "Base and notching",
     "hint": "The diagnostic feature. Look at the bottom third of the point.",
     "options": [
      "lanceolate",
      "fluted",
      "side",
      "corner",
      "basal",
      "stemmed",
      "triangle"
     ]
    },
    {
     "id": "size",
     "label": "Length",
     "hint": null,
     "options": [
      "xs",
      "s",
      "m",
      "l"
     ]
    },
    {
     "id": "age",
     "label": "Period",
     "hint": null,
     "options": [
      "paleo",
      "archaic",
      "wood",
      "miss"
     ]
    },
    {
     "id": "use",
     "label": "What it was on",
     "hint": null,
     "options": [
      "spear",
      "dart",
      "arrow",
      "knife"
     ]
    },
    {
     "id": "region",
     "label": "Region",
     "hint": null,
     "options": [
      "east",
      "plains",
      "sw",
      "west",
      "wide"
     ]
    }
   ],
   "has_safety_banner": true,
   "risk_flagged_entries": 0,
   "faq_count": 7,
   "sources": [
    {
     "name": "National Park Service — Archaeological Resources Protection Act",
     "url": "https://www.nps.gov/subjects/archeology/archaeological-resources-protection-act.htm"
    },
    {
     "name": "National NAGPRA Program",
     "url": "https://www.nps.gov/subjects/nagpra/index.htm"
    },
    {
     "name": "Society for American Archaeology — ethics and reporting",
     "url": "https://www.saa.org/"
    },
    {
     "name": "Paleoindian Database of the Americas — fluted point records",
     "url": "https://pidba.org/"
    }
   ],
   "updated": "2026-09-04"
  },
  {
   "slug": "tree-age-calculator",
   "type": "calculator",
   "group": "Plants & trees",
   "title": "How old is this tree?",
   "summary": "Wrap a tape round the trunk and get the age the way an arborist does.",
   "url": "https://orvik.app/tools/tree-age-calculator/",
   "markdown": "https://orvik.app/tools/tree-age-calculator/index.md",
   "engine_function": "treeAge",
   "engine_source": "https://orvik.app/js/engine.js",
   "computes": "Trunk circumference to tree age by the ISA growth-factor method."
  },
  {
   "slug": "seed-starting-calculator",
   "type": "calculator",
   "group": "Plants & trees",
   "title": "When do I start these seeds?",
   "summary": "One frost date turns into a sowing and transplant calendar for 34 crops.",
   "url": "https://orvik.app/tools/seed-starting-calculator/",
   "markdown": "https://orvik.app/tools/seed-starting-calculator/index.md",
   "engine_function": "seedSchedule",
   "engine_source": "https://orvik.app/js/engine.js",
   "computes": "Indoor sowing and transplant dates for 34 crops from one frost date."
  },
  {
   "slug": "pet-age-calculator",
   "type": "calculator",
   "group": "Animals",
   "title": "How old is my dog or cat in human years?",
   "summary": "The veterinary life-stage curve, scaled by adult size. Not times seven.",
   "url": "https://orvik.app/tools/pet-age-calculator/",
   "markdown": "https://orvik.app/tools/pet-age-calculator/index.md",
   "engine_function": "petAge",
   "engine_source": "https://orvik.app/js/engine.js",
   "computes": "Dog or cat age in human years on the AAHA life-stage curve."
  },
  {
   "slug": "mohs-hardness-scale",
   "type": "calculator",
   "group": "Rocks & minerals",
   "title": "Mohs hardness scale, with a scratch test you can actually do",
   "summary": "What scratches what, and which household object sits at each step.",
   "url": "https://orvik.app/tools/mohs-hardness-scale/",
   "markdown": "https://orvik.app/tools/mohs-hardness-scale/index.md",
   "engine_function": "mohsStep / mohsBracket",
   "engine_source": "https://orvik.app/js/engine.js",
   "computes": "A step of the Mohs scale, or the bracket a scratch test leaves you in."
  },
  {
   "slug": "coin-melt-value-calculator",
   "type": "calculator",
   "group": "Collecting",
   "title": "What is the silver in this coin worth?",
   "summary": "Melt value for 22 circulating silver and gold coins at any spot price.",
   "url": "https://orvik.app/tools/coin-melt-value-calculator/",
   "markdown": "https://orvik.app/tools/coin-melt-value-calculator/index.md",
   "engine_function": "coinMelt",
   "engine_source": "https://orvik.app/js/engine.js",
   "computes": "Intrinsic metal value of a silver or gold coin at a spot price you supply."
  }
 ]
}