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...
Read More

Notes

01 April 1946
Comments Notes IN the autumn of 1945 I have noticed Jackdaws (Corvus monedula spermologus) frequenting two holes in different beeches close together, at Westerham, Kent, but have been unable to prove definitely that they were breeding. A Jackdaw was seen to leave one h...
Read More

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now