Forbes-Watson's Swift (Apus berliozi) [XC321549]
by from Wadi Darbat, Dhofar, Oman (flight call)
Forbes-Watson's Swift (Apus berliozi) [XC543748]
by Alain Malengreau from Inhassoro, Inhassoro, Inhambane, Mozambique (call, flight call, flight calls)
Subspecies
Forms superspecies with African Swift (Apus barbatus), Pallid Swift (Apus pallidus) and Bradfield's Swift (Apus bradfieldi). Birds breeding in south-eastern Somalia (Hal Hambo) are apparently intermediate between nominate and subspecies bensoni.
The following 2 subspecies are recognised:
berliozi Ripley, 1965 - Socotra.
bensoni Brooke, 1969 - Somalia. Winters south to coastal Kenya.