Tracks on snow

Today I found the tracks on snow in the park. First the illegible tracks of someone with short legs, then they disappeared and then the tracks of wings - three tracks, each next is less clear than previous.

My guess: recent years in this place the different small rodents and insectivorous inhabited: moles, shrews, may be voles. I think some of its came out on the snow and was captured by Sparrowhawk. I think by Sparrowhawk, due to the small wingspan - about 45 cm.

I confused by the large size of tracks for underground inhabitants. Size is more suitable for Squirrel. But Squirrel can not come out of nowhere, but the tracks suddenly appeared and just as suddenly disappeared.