''Eocuculus cherpinae'' is a prehistoric
bird
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...
, known from postcranial remains from the late Eocene Florissant beds in Colorado.
References
Eocene birds
{{Paleo-bird-stub