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The age of Some More British Birds

01 March 1943 Comments Main paper paper is a sequel to that on the Blackbird (Turdus m. merula) (Lack, 1943a), and the latter should be read first as the remarks on treatment of material and general principles apply equally to the present paper, but are not repeated. It should be stressed... Read More

The Instinctive Nature of Nest Sanitation Part- II

01 March 1943 Comments Main paper IN a previous article (antra, Vol. xxxv, pp. 120-4), attention was drawn to the fact that nest-sanitation manifests itself as an instinctive action on the part of the parent birds. The instinct to remove faeces from the area of the nest was shown to be ca... Read More

Notes

01 March 1938 Comments Notes I HAVE paid particular attention to the singing of Crossbills (Loxia c. curvirostra) for some years, on and off, and I find that the song can be divided into four main varieties. In attempting to describe these songs below, I use the two sound descriptio... Read More