Unknown Origin
Checklist of Endemic Bird Species
This list of bird species known only a type specimens of unknown origin (for example: Sharpe's Rail) or whose breeding location has not yet been identified (for example: Beck's Petrel) is based on the taxonomy used in del Hoyo & Collar (2014 & 2016). The source list based on the December 2017 update is available online here. For further details on possible inaccuracies in the list see Sources & Caveats.
del Hoyo, J. & N.J. Collar HBW and BirdLife International Illustrated Checklist of the Birds of the World. 2014 Vol. 1: Non-passerines & 2016 Vol. 2: Passerines. Lynx Edicions, Barcelona.
Caloenas
maculata (Columbiformes Columbidae)
Liverpool Pigeon
(Extinct)
Apus
sladeniae (Caprimulgiformes Apodidae)
Fernando Po Swift
(Breeding)
Heliangelus
zusii (Caprimulgiformes Trochilidae)
Bogota Sunangel
Chlorostilbon
elegans (Caprimulgiformes Trochilidae)
Caribbean Emerald
(Extinct)
Pseudobulweria
becki (Procellariiformes Procellariidae) Beck's Petrel
(Breeding)
Eurochelidon
sirintarae (Passeriformes Hirundinidae)
White-eyed River Martin (Breeding)
Petrochelidon
perdita (Passeriformes Hirundinidae)
Red Sea Swallow
(Breeding)