 The animal experts say the species itself is hard to document because they usually avoid people and they're pretty small. But now that they're literally outside their window, the job might have gotten a little easier. According to the National Wildlife Federation, flying squirrels don't fly like a bird or a bat, but rather glide. They're pretty graceful in the air, but on the ground move more like a hobbled horse and have a hard time getting around. A zoologist for Nebraska says he doesn't know how they made it to Lincoln, but it's just another question to answer about their new neighbors.