Geographical variation and distribution in Apus barbatus, A. bradfieldi, and A. niansae (Aves: Apodidae)
Bradfield's Swift is a good species and should not be lumped into barbatus as proposed by Lack (1956). Birds from Kuruman, Northern Cape are a new subspecies, deserticola.
Durban Museum Novitates
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Geographical variation and distribution in Apus barbatus.pdf | 258.69 KB |