Animal Track Size & Species Estimator
Measure a track’s length and width, note whether claws are visible, and see which common track-makers it fits best — ranked, not just a single guess.
Closest matches
A starting point for field ID, not a certain identification — substrate, gait, and the individual animal all shift a print’s apparent size. Cross-check with a full field guide for anything that matters.
How the match works
Every common track-maker in the reference set has a typical length and width range drawn from published field-tracking guides. The estimator scores each animal by how far your measurements fall outside its range — zero if both numbers land inside it — and adds a small penalty when the claw visibility you report doesn’t match what that animal typically leaves behind. The results are sorted best-fit first.
This is why two animals of a similar size, like a coyote and a bobcat, sort correctly even when their length and width overlap: the claw signal (canid claws show, cat claws don’t) usually breaks the tie.
Frequently Asked Questions
How accurate is a track-size match?
Treat it as a shortlist, not a verdict. The tool ranks common track-makers by how closely your measurements fit their typical published size range, using claw visibility to break ties between similarly sized animals. Substrate, gait, an individual animal's size, and measurement error all shift a real print larger or smaller than the textbook range, so the top match is a strong lead to confirm, not a certain ID.
Why does claw visibility matter so much?
It's often the fastest way to split animals that overlap in size. Canids (foxes, coyotes, wolves), bears, raccoons, and mustelids typically register clear claw marks ahead of the toes. Cats walk with their claws retracted, so a clean bobcat or cougar print usually shows none. Deer, elk, and moose leave a hoof at a walk — no claw marks at all, just two elongated lobes.
Should I measure length including or excluding claw marks?
Measure the pad-and-toes length only, without any separate claw punctures ahead of it. Field guides report track dimensions this way, and this tool's reference ranges follow the same convention, so mixing in claw length would make an otherwise good print look larger than it is.
Educational tool only. Results are a general field-guide-style estimate, not a certain identification — verify anything that matters against a full field guide or a local expert.