Meet Anurognathus. Looks like a bat, right? Well it's actually a pterosaur: an extinct flying reptile that lived alongside the dinosaurs.

It lived about 150 million years ago during the Jurassic period. It was less than a foot long, had about a foot to a foot and a half wingspan and was likely nocturnal.
We even know the colour of these animals thanks to fossilized melanosomes. Brown.
Not exciting but excellent for a small animal living in the forest!