Little or White-rumped Swift ? Sirs,---The interesting article by I. J. Ferguson-Lees on Apus affinis {Brit. Birds, 60: 286-290) prompts me to raise two points. The first is the choice of the vernacular name 'White-rumped Swift' in preference to that of 'Little Swift' for this species. Not only would it be easily the smallest swift in Europe, but this Ethiopian species barely enters the Palearctic Reg...

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