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Letters

01 October 1950 Comments Letters --I am engaged in investigating t h e ringing records of Blue Tits. Amongst the known causes of death it is astonishing to find that the mousetrap is a principal one. I t may be necessary to place r a t and mouse traps in gardens, b u t I suggest that the...

Notes

01 October 1950 Comments Notes WITH reference to the note (antea, p. 54) on this topic, in June, 1949, an Arctic Tern (Sterna macrura) made repeated stoops at my companion, Dr. H. K. Whitehouse, while he was standing by the bank of the river in Hvalfjordur a few yards from our camp in...

Methods of determining breeding-cliff populations of Guillemots and Razorbills

01 October 1950 Comments Main paper A CENSUS of cliff-nesting seabirds is usually carried out by making a careful count of every occupied nest, thus giving the number of breeding pairs. This is the most accurate method and can be carried out comparatively easily in the case of species that ...

Studies of some species rarely photographed: XXVII. Temminck's Stint, The Semipalmated Sandpiper, The Little Stint

01 October 1950 Comments Main paper Photographed by C. G. DES FORGES and j . E. SLUITERS. (Plates 50-59)IN the present instalment of this series we illustrate the two European stints and one of the American species on the British List. Temminck's Stint (Calidris temminckii) has a wide bree...

Recovery of marked birds

01 October 1950 Comments Main paper Fair Isle Bird Obs., 8.6.49. Noness, Shetland, 25.10.49. Rogart (Suth.), 26.5.49, D y Bushmills (Antrim), 3.12.49. R. Carrick. St. Osyth (Essex), 17.5.49, Boston (Lines.), 13.11.49 by R. W. Arthur. [95 m. N.N.W.].Chipping (Lanes.), 23.3.50 [170 m. S.]. Ly...

The index of heron population

01 March 1950 Comments Main paper The number of heronries on which reports for 1949 were received at the Edward Grey Institute was 162, or 16 more than in the previous year. Of these 117 were in England, 9 in Wales, 17 in Scotland and 19 in Ireland. We are indebted to 79 informants of who...

The Behaviour Of Corn-Crakes

01 March 1950 Comments Main paper MASON DURING the past few years the writer, with the help of friends, has carried out a series of experiments with Corn-Crakes {Crex crex) The experiments consist in calling up Corn-Crakes to a stuffed dummy by imitating the " crake-crake " song with a p...

On The Courtship And Social Displays Of Three Species Of Auk

01 March 1950 Comments Main paper CONDER DURING the summer of 1947 I had opportunities of watching the breeding displays of the Razorbill (Aha torda), the Guillemot (Una aalge), and the Puffin (Fratercula arctica) on Skokholm, Pembrokeshire. The displays of the three species occurred chi...

SEQUENCE OF PLUMAGES IN BRITISH BIRDS I.—INTRODUCTORY

01 July 1910 Comments ...

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