Letters

01 May 1980 Comments Letters Judging the size of birds The frequency with which observers claim to have made an accurate assessment of a bird's size, in situations where it is impossible to judge distance, or where there are no other species close by for comparison, lead...
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Letters

01 March 1935 Comments Letters SIRS,--In view of t h e recent article b y Brian Roberts on t h e Gannet colonies of Iceland (antea, pp. 100-105) it may be of interest to record the following observations on the colony a t Grimsey, off north Iceland. Roberts recorded twenty-one pairs of...
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