Coba jelasin Keluarga Aegialornithidae (fosil) dari Apodiformes dalam bahasa melayu dong

Keluarga Trochilidae – burung madu

Keluarga Apodidae – burung Layang-layang

Keluarga Hemiprocnidae – burung Layang-layang Jambul

Dyke, Gareth J.; Waterhouse, David M. & Kristoffersen, Anette M. (2004): Three new fossil landbirds from the early Paleogene of Denmark. Bulletin of the Geological Society of Denmark 51: 47–56. PDF fulltext

Hyman, Libbie Henrietta (1992). Hyman's Comparative Vertebrate Anatomy.  Chicago: University of Chicago Press, page 39.  ISBN 0-226-87013-8

Mayr, Gerald (2002): Osteological evidence for paraphyly of the avian order Caprimulgiformes (nightjars and allies). Journal für Ornithologie 143: 82–97. PDF fulltext

Mayr, Gerald (2003): Phylogeny of early tertiary swifts and hummingbirds (Aves: Apodiformes). Auk 120(1): 145–151. DOI: DOI: 10.1642/0004-8038(2003)120[0145:POETSA]2.0.CO;2 PDF fulltext