# Eocypselus

> genus of birds (fossil)

**Wikidata**: [Q21078744](https://www.wikidata.org/wiki/Q21078744)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eocypselus)  
**Source**: https://4ort.xyz/entity/eocypselus


## References

1. Fossilworks
2. A revision of the fossil swifts (Vertebrata, Aves, Suborder Apodi), with descriptions of three new genera and two new species
3. Global Biodiversity Information Facility
4. Interim Register of Marine and Nonmarine Genera
5. Open Tree of Life reference taxonomy version 3.6