Horus Swift (Apus horus) [XC438047]
by Bram Piot from Gamadji Sare, Podor, Senegal (call)
Horus Swift (Apus horus) [XC410343]
by Bram Piot from Gamadji Sare, Podor, Senegal (call)
Subspecies
Horus Swift (Apus horus) and Loanda Swift (Apus toulsoni) (Sibley and Monroe 1990, 1993) are retained as separate species contra Dowsett and Forbes-Watson (1993) who include toulsoni as a subspecies of Horus Swift (Apus horus).
Taxonomic status of form "toulsoni" of north-western Angola and Zimbabwe is highly controversial, and it has been considered a full species, but is probably best treated as a dark morph within nominate subspecies.
The following 2 subspecies are recognised:
horus (Heuglin, 1869) - Central Ethiopia, central-southern Kenya and northern Tanzania, and north-western Uganda to Burundi and eastern Zaire; Zambia to south-western Cape (South Africa); more isolated populations in Nigeria, northern Cameroon, western Chad, western and east-central Sudan, extreme western Zaire and north-western Angola.
fuscobrunneus Brooke, 1971 - South-western Angola. Considered by some authors to be a distinct species, Loanda Swift (Apus toulsoni).