* Period/Epoch: Quaternary
* Rock Formation: N/A
* State, County: Wyoming, Bighorn Co.
Taxonomy: Aves
Birds (Aves) are an ancient group of vertebrate animals, having evolved from dinosaurs. This is the ulna, a strong bone in the wing of a bird. Fossil birds can be very difficult to identify.
Imaged with the David SLS-2 Scanner.