Eocypselus is a genus of prehistoric birds related to modern hummingbirds and swifts. Five species of Eocypselus are currently known. Compared with modern apodiforms, it may have been a better percher with shorter wing feathers, and it might have been nocturnal.
Eocypselus is a genus of prehistoric birds related to modern hummingbirds and swifts. Five species of Eocypselus are currently known. Compared with modern apodiforms, it may have been a better percher with shorter wing feathers, and it might have been nocturnal.
== History and species == Fossils of E. vincenti, the Eocypselus type species (comprising a wing and pectoral bone) were initially recognized from the London Clay Formation of England and named by C.J.O. Harrison in 1984. An additional specimen of this species was later identified from the Fur Formation of Denmark and described in 2010.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).