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Fernando Po Swift  Apus sladeniae
BirdLife is updating this factsheet for the 2016 Red List
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Taxonomic source(s)
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

Taxonomic note
Apus barbatus (Sibley and Monroe 1990, 1993) has been split into A. barbatus and A. sladeniae following Dowsett and Forbes-Watson (1993). A. balstoni (Sibley and Monroe 1990, 1993) is retained as a separate species contra

Distribution and population
Apus sladeniae is known from the Bakossi Mountains in west Cameroon (one record only), south-east Nigeria (one record only) (Elgood 1981) and Mt Moco in Angola (though the Angolan specimens need confirmation) (Traylor 1960, da Rosa Pinto 1983). It is also known from Bioko, Equatorial Guinea, where six specimens were collected in 1903, but with no subsequent records (Pérez del Val 1996). There is a possible sighting (requiring confirmation) of c.10 birds at Moca in Monte Alen National Park in January 1998 - the first record for mainland Equatorial Guinea (Dowsett-Lemaire and Dowsett 1999a). It has been suggested that the species breeds on Bioko and visits the mainland during the non-breeding season, but its true status (including its taxonomic position relating to African Swift A. barbatus) remains uncertain.

Population justification
The population size of this species has not been quantified; it is known from only 10 records.

Trend justification
The population trend is unknown as the species is only known from very few records and very little is known about its ecology.

It is probably primarily a mountain species.

Unknown, but may be threatened by forest loss in part or all of its range.

Conservation Actions Underway
None is known. Conservation Actions Proposed
Clarify taxonomic position relating to African Swift A. barbatus and identity of birds in northern Liberia. Survey mountainous areas near locations of historical records. Attempt to clarify its movements and ecological requirements.

Collar, N. J.; Stuart, S. N. 1985. Threatened birds of Africa and related islands: the ICBP/IUCN Red Data Book. International Council for Bird Preservation, and International Union for Conservation of Nature and Natural Resources, Cambridge, U.K.

da Rosa Pinto, A. A. 1983. Ornithologia de Angola. Instituto de Investigacao Cientifica Tropical, Lisbon.

del Hoyo, J.; Elliott, A.; Sargatal, J. 1999. Handbook of the Birds of the World, vol. 5: Barn-owls to Hummingbirds. Lynx Edicions, Barcelona, Spain.

Dowsett-Lemaire, F.; Dowsett, R. J. 1999. Birds of the Parque Nacional de Monte Alen, mainland Equatorial Guinea, with an updating of the country's list. Alauda 67: 179-188.

Elgood, J. H. 1981. The birds of Nigeria. British Ornithologists' Union, London.

Pérez del Val, J. 1996. Las aves de Bioko, Guinea Ecuatorial: guía de campo. Edilesa, Leon.

Traylor, M. A. 1960. Notes on the birds of Angola, non-passeres. Publicacoes Culturais, Lisbon.

Further web sources of information
Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Shutes, S., Butchart, S., Benstead, P., Bird, J., Symes, A.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2016) Species factsheet: Apus sladeniae. Downloaded from on 27/10/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from on 27/10/2016.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Data Deficient
Family Apodidae (Swifts)
Species name author (Ogilvie-Grant, 1904)
Population size Unknown mature individuals
Population trend Unknown
Distribution size (breeding/resident) 12,600 km2
Country endemic? No
Links to further information
- Additional Information on this species