Fifty years ago

01 June 1980 Comments Other 'ROOKS COLLECTING RUBBER OBJECTS. The Rooks (Corvus f. frugilegus) of Wanstead Park have a strange custom which may not have been brought before the notice of readers of British Birds. For more than twenty years they have been in the habit of collectin...
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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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