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A Black-headed Gull showing both albinism and melanism

01 January 1975 Comments Main paper ...

Reviews

01 September 1962 Comments Reviews Identification for Ringers: 2. T h e Genus Phylloscopus. By Kenneth Williamson. British Trust for Ornithology, Oxford, 1962. 86 pages; 1 colour and 4 monochrome plates. 7s. There are now about a thousand ringers in Britain. Many of these are trained and l...

Notes

01 September 1962 Comments Notes Shelduck moulting in breeding area.--On 9th July 1961, in an area of extensive fresh grazing marshes in north Kent, I noticed an adult male Shelduck (Tadorna tadornd) swimming along the edge of a large fleet. The knob on its bill had regressed, but it was...

Studies of less familiar birds 119. Great Grey Owl

01 September 1962 Comments Main paper mbulosd) by Oscar Moberg were published in British Birds in 1956 (49: plates 1-3), but the remarkable flight pictures by Hilding Mickelsson and Goran Hansson n o w reproduced o n plates 60 and 61 more than justify the species being included in this series...

Radar films of migration over eastern England

01 September 1962 Comments Main paper Research Laboratories of Marconi's Wireless Telegraphy Co. Ltd., at Great Baddow, Chelmsford, Essex, have taken films of a radar display by time-lapse photography and many of these provide a clear record of bird migration; some were shown at the British O...

Behaviour of Pied Flycatchers during an eclipse of the sun

01 September 1962 Comments Main paper during eclipses of the sun, when light intensities may be lower than those which inhibit feeding and other regular activities on normal evenings. This short paper therefore sets out to record some observations which my wife and I made on a pair of Pied Fl...

Reviews

01 February 1961 Comments Reviews Vara Faglar i Norden (Our Birds in the North). Second edition edited by Kai Curry-LindaM (Swedish text). Bokforlaget Natur och Cultur, Stockholm, 1959 and i960. Volumes I and II, 1022 pages; coloured and black-and-white plates, and maps, (Four volumes: Sw...

Notes

01 February 1961 Comments Notes Ring-necked Duck in Co. Armagh.--A male Ring-necked Duck (Aythya collaris) stayed on the lake in the Public Park, Lurgan, Co. Armagh, from 20th March till 1st May i960 and was seen on many occasions by various observers. It then disappeared, but returned ...

Some photographic studies of the Nightjar

01 February 1961 Comments Main paper I N G E N E R A L W E TRY to publish photographs for their biological interest or because they illustrate points of identification, rather than for their aesthetic value. This aim is always borne in mind in the selection and presentation of the photograph...

An interpretation of variation in the dark-headed forms of the Yellow Wagtail

01 February 1961 Comments Main paper variation to be seen in the Yellow Wagtail (Motacilla flava). T h e chief mistake made by most investigators has been that of splitting the group into too many forms on the basis of too few specimens, the most flagrant example of this being in the monogra...

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A Black-headed Gull showing both albinism and melanism

Reviews

Notes

Studies of less familiar birds 119. Great Grey Owl

Radar films of migration over eastern England

Behaviour of Pied Flycatchers during an eclipse of the sun

Reviews

Notes

Some photographic studies of the Nightjar

An interpretation of variation in the dark-headed forms of the Yellow Wagtail

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