Notes

01 November 1963
Comments Notes IT has long been known that, in the Common Crossbill (Loxia curvirostra) the mandibles cross indifferently on either side in different individuals. Recently, however, for a special purpose, I desired to ascertain whether or not individuals having the man...
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Letters

01 January 1950
Comments Letters SIRS,--I have delayed answering the letter on the above subject from Mr. P. H. T. Hartley (British Birds, xli, pp. 254-255) because the data then available only served to justify his remark that " more investigation is needed." I examined the two sets of ...
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Notes

01 January 1950
Comments Notes IT is well-known that a great many species of birds make use of old nests of the Magpie (Pica pica). I have several times seen examples of Carrion Crows (Corvus corone) doing so. In 1949, for the first time, I have had an example of Rooks (C. frugilegus)...
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Notes

01 November 1931
Comments Notes reference to this enquiry, a good many observers have not yet sent in their schedules and are now urged to do so in order that the great labour of collating the information may be commenced without delay. All schedules and communications with reference t...
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