NO. II CLASSIFICATION, BIRDS OF THE WORLD— WETMORE 20, 



Order Caprimulgi formes, Oilbirds, Goatsuckers. 

 Suborder Steatornithes, Oilbirds. 



Family Steatornithidae, Oilbirds. 

 Suborder Caprimulgi, Frogmouths, Goatsuckers. 

 Family Podargidae, Frogmouths. 

 Nyctibiidae, Potoos. 

 Aegothelidae, Owlet-frogmouths. 

 Caprimulgidae, Goatsuckers. 

 Order Apodiformes, Swifts, Hummingbirds. 

 Suborder Apodi, Swifts. 



[Family Aegialornithidae, 3 Aegialomis (fossil).] 

 Apodidae, Swifts. 

 Hemiprocnidae, Crested Swifts. 

 Suborder Trochili, Hummingbirds. 



Family Trochilidae, Hummingbirds. 

 Order Colii formes, Colies. 



Family Coliidae, Colies. 

 Order Trogoni formes, Trogons. 



Family Trogonidae, Trogons. 

 Order Coracii formes, Kingfishers, Bee-eaters, Rollers, Horn- 

 bills. 

 Suborder Alcedines, Kingfishers, Todies, Motmots. 

 Superfamily Alcedinoidea, Kingfishers. 



Family Alcedinidae, Kingfishers. 

 Superfamily Todoidea, Todies. 



Family Todidae, Todies. 

 Superfamily Momotoidea, Motmots. 

 Family Momotidae, Motmots. 

 Suborder Meropes, Bee-eaters. 



Family Meropidae, Bee-eaters. 

 Suborder Coracii, Rollers, Hoopoes. 

 Family Coraciidae, Rollers. 



Brachypteraciidae, Groundrollers. 

 Leptosomatidae, Cuckoo-rollers. 

 Upupidae, Hoopoes. 

 Phoeniculidae, Woodhoopoes. 

 Suborder Bucerotes, Hornbills. 



Family Bucerotidae, Hornbills. 



3 Position provisional. 



