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Article
D. F. Owen 1959-04-01Ibis, 101(2)Summary. 1 Annual variations in the breeding season of the Rook near Oxford could be correlated with mean air temperatures in the period prior to egg-laying. 2 The most frequent clutch-size was four to five, and in five out of six years, broods [...]
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David Lack ; John Gibb ; D. F. Owen 1957-06-01Proceedings of the Zoological Society of London, 128(3)1 In most years the mean weight of nestling Great and Blue Tits was lower in larger than smaller broods, but it was similar in 1948, when food was exceptionally abundant. 2 In most years, the commonest clutch of the Great Tit was nine or ten, an[...]
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D. W. Snow ; D. F. Owen ; R. E. Moreau 1955-07-01Ibis, 97(3)SUMMARY. 1 Between 28 September and 31 October 1954 a visit was paid to N.W. Spain to study the autumn migration and also to collect local information about migrants. Much of the coast between the mouth of the Miño and Santander was visited. 2 W[...]
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D. F. Owen 1955Journal of the Society for British Entomology, 5(3)
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David Lack ; D. F. Owen 1955Journal of Animal Ecology, 24(1)1. Swifts feed on air-borne insects, but take more varied foods than those in the true aeroplankton, since they often feed close to the ground, to trees or to open water. 2. They seek out places where air-borne insects are abundant; this varies [...]
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D. F. Owen 1954-04-01Ibis, 96(2)1 1500 weights of tits were obtained in the winter 1951–52 and in November and December 1952. 2 On average the birds weighed least in the early morning and most just before going to roost in the late afternoon. The increase in weight slackened o[...]
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D. F. Owen ; J.F. Burton 1953Alauda, 21(4)
