1. What gait?
This is a classic bound. Notice the two (hind) feet at the top inline with each other (though they can be a bit offset) and the two staggered (front) feet at the bottom (though in general the fronts of a bound can be inline or even more staggered).
2. What species?
This is the classic track pattern of the lagomorph family. While the toes show up a bit here, often all that is visible is the outline of the feet (though in some substrates all you might see is the claw marks).
One of the reasons I wanted to put these tracks up for a track of the week was to show an example of how useful gaits can be in identification. Looking at individual tracks of these species can be deceptive: it is possible to confuse them with anything from a squirrel up to a cougar or a dog. But pull back and if you can see the track pattern it is almost unmistakable.
Because of the location and size we can identify this as a snowshoe hare (Lepus americanus).
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