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The Inner Territory of the Black-Headed Gull

01 October 1940 Comments Main paper THE present writer in a book--Bird Behaviour--made a statement to the effect that " the territory of a Black-headed Gull (L. ridibundus) has no fixed boundary : it may react to an intruder at a distance of two feet or less, or at two yards or more " (p. 3...

Letters

01 October 1934 Comments Letters SIRS,--Mr. R. L. Brown, in his interesting notes on the Kingfisher (antea, p. 83), reports a pair of birds having a clutch several days incubated when they had at the same time a brood in an adjacent nest. The experience especially interested me because t...

THE BIRTH OF A BLACK-HEADED GULL

01 October 1931 Comments ...

Notes

01 September 1931 Comments Notes 1 OBSERVE that in Vol. XX., p. 150, May n t h is mentioned as the earliest recorded date for a complete clutch of the Redbacked Shrike (Lanhis c. collurio). It is therefore of interest to record t h a t I personally took a clutch of five eggs on May 5th,...