Darkwing by Kenneth Oppel
Oppel presents an anthropomorphic evolution experience of two mammal species during the twilight of dinosaurs. Dusk is a chiropter (early bat) newborn who defies his colony by flying not just gliding.
Intelligent design followers will not like the evolution elements in this book, but there could be some debate about the source of the voice Dusk hears in his visions (hallucinations ?).
I've read 175 pages and can see an audience for the book, but don't think it is TU caliber. NAY