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...
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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...
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Letter

01 December 1940 Comments Letters SIRS,--For some years past, Mr. Charles Oldham has regularly published observations on t h e midsummer movements of Swallows, House- and Sand-Martins and Swifts at t h e Tring and Elstree Reservoirs in t h e Transactions of the Herts Nat. Hist. Soc. An id...
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Notes

01 December 1940 Comments Notes DURING a visit to Achill Island from June 6th to 16th, 1938, I made records of species seen, and my observations may be of interest as a supplement to the paper by Mr. R. S. R. Fitter in the issue of British Birds for November, 1940. I covered most of th...
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