
You’ll see this assertion a lot in online tracking communities; it’s even part of the spiel on telling the difference between canine and feline tracks at a sanctuary where I volunteer. Claws mean dog; no claws mean cat.
First of all, that’s not necessarily true. Cats do have claws, after all, and just because they tend to keep them retracted when on the move doesn’t mean that they always do. There are no universal, one hundred percent always true criteria in tracking. Variations in substrate, in behavior, in movement, and many other variables make for tracks and sign that show up differently than you’d expect.
Secondly, stopping at a single criterion or description when IDing a track or sign risks short-circuiting the observational skill that tracking both leverages and trains. Even when I’m sure of an ID, I’ve gotten into the habit of looking for at least three indications that I’m correct. Every so often, doing so causes me to change my mind—or at least consider alternatives to my ID. If I can’t come up with three, I need to study more.
But let’s get back to cats and dogs.
It is true that the claws guideline is often a reliable starting point.Feline and canine tracks are similar, but there are several ways to distinguish them beyond claws. To begin with, there’s the overall shape: canine tracks are generally more oval, longer front to back than side to side. Feline tracks are generally rounder. They both have four toes, but the dog’s tracks will have the middle two toes leading, while the outer toes are set further back (and, in some species such as the coyote and black-backed jackal, are almost behind the middle toes). Meanwhile, the cat’s toes are more spread out laterally. One of the two middle toes will usually be slightly ahead of all the rest, and that will indicate whether the foot that made it was a left or a right.
Here are some nice, clear canine tracks, a front and hind side by side. The overall tidiness and diminutive size leads me to ID this as coyote.Here already we’ll run into exceptions. While the above holds true for every wild canine I’ve ever seen, and every wild or domestic feline, domestic dog tracks can vary enormously when it comes to overall shape and how the toes show up in relation to one another in the track. There’s also the question of substrate: something loose and slippery, like deep, dry sand, can cause even a canine foot to spread out laterally. I once misidentified a mountain lion track as a large domestic dog for this very reason. (Also, claws—but we’ll come back to that!)
The above can affect the placement of the toes in relation to the palm or heel; that said, as a general rule, with a canine track you can draw an “X” by making two lines starting between the outer toes on each side, and going straight to the bottom of the track, without ever crossing the heel pad. With a feline track, at least one of those lines will cross the heel pad.
Here’s a nice, clear bobcat track, found on a dirt road in western Washington.Then there’s the shape of the heel pad. If you’re lucky enough to find a super clear and detailed track, you’ll see a more triangular shape to the heel if the track is canine, while the feline’s is more trapezoidal. The canine track will have two lobes at the rear of the heel pad, while the feline track will have three—though this is one of those details that tends to show up less clearly in messy substrate. The way that I’m giving exceptions to every guideline here hopefully highlights the importance of having more than one support for a given ID.
And that goes for claws, too. Cats use claws for two things: as weapons, and for traction. On slippery ground, such as mud, snow, or soft sand, they might well use their claws to keep from sliding.
Similarly, claws don’t always show in canine tracks. Coyote claws can be so narrow and pointed that they don’t register on harder substrate, and gray foxes actually have semi-retractable claws.
A pair of gray fox tracks. The overall characteristics are distinctly canine, but claws are not showing.One of the frustrating things about tracking is that there are always exceptions. That’s also one of the wonderful things about it. On an eval I took recently there was so much debate about one of the stations that even the evaluators finally agreed that there was room for an alternative interpretation. I often like to say that the wildlife hasn’t read the field manuals, and even guidebooks written by experts aren’t prescriptive. Asking further questions is an invitation to look for further evidence. Sometimes, those are the claws of a cat.
(Originally posted at Following Curiosity. You can comment here or there.)