Letters

01 February 1975
Comments Letters Bill colour of juvenile Arctic Terns Graham Bundy {Brit. Birds, 67: 246-247) stated that the bills of juvenile Arctic Terns Sterna paradisaea on their breeding grounds in Shetland have definite red or orange at the base, this being at variance ...
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Letters

01 April 1967
Comments Letters Eruptions of Great Tits and other species Sirs,--I was interested in Dr. C. M. Perrins's paper on the effect of the seed crop of the beech Fagus sylvatka on the populations and movements of the Great Tit Partis major (Brit, Birds, 59: 419-432). To strengt...
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