The footprints on the left are from a domestic cat. (Notice no claws, as you would see from a dog.) The long, thin print is indeed from a snake. I saw him, so I know that it was a Coachwhip Snake. The bird tracks from from a Mourning Dove. The tiny rows of trail are from the large millipedes that live in the dunes at our beach. Around the top cat footprint, you can also see the trails of tiny isopods, crustaceans that live just under the surface of the sand.