Letters

01 April 1986 Comments Letters Escapes? Some years ago, Derek Goodwin and the late Derrick England published some long comments on the problem for birdwatchers of escaped cage birds (Brit. Birds49: 339-349; 67: 177-197). Since those papers, a new generation of birders has appeared, ...
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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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