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Breeding biology of Buzzards at Sedbergh during 1937-67

01 September 1971 Comments Main paper Since 1937, observations on Buzzards Buteo buteo breeding within ten miles of Sedbergh, Yorkshire, have been recorded by the Sedgwick Society of Sedbergh School. The present paper shows the results of an analysis of these records, supplemented by my own o...

Studies of less familiar birds 167: Golden Oriole

01 September 1971 Comments Main paper Plates 61-63 The 28 species of Old World orioles (Oriolidae) form a remarkably homogenous group of arboreal passerines of wide distribution over Africa, Eurasia and Australasia. Systematically they are placed between the drongos (Dicruridae) and the crows...

North American waterfowl in Europe

01 September 1971 Comments Main paper The natural occurrence of North American birds in Europe is a wellestablished fact substantiated by recoveries of ringed birds. The transatlantic crossings of waders and passerines have been excellently treated by Nisbet (1959, 1963) and, more recently, b...

Rook numbers in Nottinghamshire over 35 year

01 September 1971 Comments Main paper frugilegus in Nottinghamshire in 1962 and compares the figures with those from four other censuses in the previous 34 years. The first counts were made by A. Roebuck in 1928 (Roebuck 1933) and again in 1932. There was then a wartime census by A. I. H. Doc...

Studies of less familiar birds 129. Cetti's Warbler

01 September 1971 Comments Main paper C E T T I ' S W A R B L E R Cettia cetti, named after an 18th century Italian Jesuit zoologist (see Macleod 1954), is unique in various ways. Apart from being the sole species in a subgenus characterised by long, soft plumage and a very rounded tail with ...

A study of Swift weights

01 September 1971 Comments Main paper N E A R L Y A L L OF 2,546 Swifts Apus apus caught at Rye Meads Sewage Purification Works, Hertfordshire, in the late spring and summer of 1962 (845) and 1963 (1,701) were weighed and examined before being ringed and released. The pattern of the weights w...

Residues of Organo-chlorine insecticides in a Golden Eagle

01 September 1971 Comments Main paper Nature Conservancy Unit of Grouse Department of Agriculture and Fisheries and Moorland Ecology for Scotland, Scientific Services O N 12TH A P R I L 1963 a female Golden Eagle Aquila chrysaetos was found dead on the ground about 2 5 o metres from a pine-tr...

Watching migration by radar

01 August 1959 Comments Main paper So FAR AS I know, the first time that radar echoes were definitely identified as coming from birds was in the spring of 1940, when an experimental equipment on a wavelength of 50 cm. at Christchurch, Hampshire, detected gulls (Larus spp.) (Shire, 1958). U...

The spread of the Eider in Great Britain

01 August 1959 Comments Main paper range of the Eider (Somateria mollissima) in the southern half of Great Britain since the Second W o r l d W a r , and also to describe the increasing number of birds which are recorded in summer along the same parts of the coast even though they are far ...

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