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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...

Letters

01 February 1938 Comments Letters SIRS,--In reply to Mr. Lockley's letter under this heading (antea, pp. 278-9), I had two main points t o make in m y report on Skokholm Island, namely :-- 1. That owing t o its depredations on Storm-Petrels, the Little Owl should, if possible, be prevente...

Notes

01 February 1938 Comments Notes ON April 15th, 1937, a male Bullfinch which appeared to be much larger than the British Bullfinch (Pyrrhula p. pileata) was seen moving about in some trees on Holy Island. Later in the day this bird was shot by a resident on the island and was sent in to...

Recovery of marked birds

01 February 1938 Comments Main paper Rawdon (Yorks), 24.4.37, by Bramhope (Yorks), 15.7.37. C. Wontner-Smith. Ditto 4-S-37- Allerton (Yorks), 13.8.37. Stodmarsh (Kent), 16.4.33, by Where ringed, --.9.37. Oxford Orn. Soc. R I N G E D AS FULL-GROWN. Gt. Budworth (Ches), 17.7.35, Acton Bridge ...

Birds seen in two winter transects of the North Atlantic

01 February 1938 Comments Main paper bird-counts of the North Atlantic crossing have already appeared, and in these the significance of the figures has been fully discussed. The most comprehensive is by V. C. Wynne-Edwards (Proc. Boston Soc, Nat. Hist., Vol. XL., No. 4, pp. 233-346. January,...

Notes on the Gannetries of Sule Stack and Sula Sgeir

01 February 1938 Comments Main paper (Plate I I . ) IT may be safely said that in a quarter of a century no new information has been added to our previous knowledge of the gannetry of Sule Stack, and with the exception of my notes on Sula Sgeir [10]* these same remarks apply to this latter g...

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