Letter

01 January 2001
Comments Letters I found Colin Bradshaw's note of caution regarding the separation of Acrocephalus and Hippolais warblers (Brit. Birds 93: 277) most interesting. He placed particular emphasis on the perceived difficulties of separating Olivaceous Warbler H. pallida fro...
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Letters

01 November 1986
Comments Letters Depths to which auks dive. With reference to the recent note on 'Razorbill [Alca torda] swimming at depth of 140 m' (Brit. Birds 79: 339), I draw attention to a paper published in The Auk last year on 'Diving depths of four alcids' by John F. Piatt and...
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