Letters

01 January 1968 Comments Letters 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 '...
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Letters

01 November 1966 Comments Letters Fault-bars as a means of ageing birds Sirs,---Last year I read a letter by C. J. Mead on the ageing of birds by means of fault-bars (Brit. Birds, 58: 227-228), in which he referred to the work of W. E. Glegg who noted fault-bars on the tails of 737 bird s...
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