In moss, leaf litter, dry sand, and powdery snow, you may not ever find a clear print showing toe numbers, the presence of claws and other features that help you determine which species made the track. But we can still learn a lot from the overall compression shape left behind on those substrates. Felines leave a round compression track, while canines leave on oval compression. Deer leave a heart-shaped compression, while rodents leave a cross-shaped track behind and rabbit feet make a mark resembling an exclamation point. Get to know the size, track pattern and overall shape of your local animal tracks, and you’ll be able determine species from compressions alone.