Letters

01 July 1978 Comments Letters Diving methods of Great Northern and Black-throated Divers On inland waters, I have noticed that Great Northern Divers Gavia immer always slither under slowly when diving, whereas Black-throated G. arctica jump upwards slightly before they dive...
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Letters

01 April 1968 Comments Letters Taxonomic responsibility Sirs,--In his review (Brit. Birds, 59:312-315) of the revised and enlarged edition of A Field Guide to the Birds of Britain and Europe (1966), E. M. Nicholson remarked on the arbitrary alteration of the classification, sequence an...
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