Arctic Redpoll ID

01 February 2000
Comments Main paper The identification of Arctic Redpolls Carduelis hornemanni has been exhaustively covered, and the main criteria used to separate them from Common Redpolls C. flammea have been well described (Lansdown et al. 1991; Stoddart 1991; Czaplak 1995; ...
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A study of Swift weights

01 September 1971
Comments Main paper N E A R L Y A L L OF 2,546 Swifts Apus apus caught at Rye Meads Sewage Purification Works, Hertfordshire, in the late spring and summer of 1962 (845) and 1963 (1,701) were weighed and examined before being ringed and released. The pattern of the weights w...
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