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Letters

01 December 1950 Comments Letters SIRS,---A note recently published in British Birds (antea, p. 89) commenting on the presence of Bewick's Swans a t Malltraeth, suggests t h a t the status of this species in Anglesey is t h a t of a n occasional visitor. These birds are, however, more reg...

Review

01 December 1950 Comments Reviews Robin Redbreast. By David Lack. (Oxford University Press ; L o n d o n : Geoffrey Cumberlege. 15/-). In this volume, which appears to be a by-product of his earlier work and is a sort of ornithological jeu d'esprit, Dr. Lack deals with the " unnatural h i...

Notes

01 December 1950 Comments Notes " A N T I N G " OF CARRION CROW ON June 15th, 1949, at Strawberry Hill, Middlesex, 1 observed a Carrion Crow (Corvus corone), at a distance of twenty yards, behaving in a peculiar manner. It was squatting on the grass with its feathers widespread. At hal...

The Iceland Gull in winter

01 December 1950 Comments Main paper 'FOR some obscure reason the Glaucous Gull (Lams hyperboreus) became comparatively numerous in Shetland waters during the winters of the late war. Since then its numbers have dropped back to the normal few. Whatever was the reason for this fluctuation, t...

Nestling mortality amongst tits on Tentsmuir, 1949 and 1950

01 December 1950 Comments Main paper F O R experiments in the value of tits as controls for insect pests in woods I have put up some 500 nest boxes in 20 sites round Perth. Some of these sites are as much as 40 nv'les to the north of Perth, others in Tentsmuir about 20 miles to the east. In ...

The formation and persistence of Pairs in the Marsh-Tit

01 December 1950 Comments Main paper years ago Morris (1870) in the second edition of his History of British Birds remarked of the Marsh-Tit (Parus palustris) that " the male is believed to choose a partner for life," though unfortunately the species was not then distinguished from the Willo...

Editorial

01 December 1950 Comments Editorials WE are asked by the publishers to announce that the annual subscription to British Birds is to be raised by one shilling. We regret having to remind readers that the cost of living is rising, but we regret still more having to make this increase, small t...

Letters

01 April 1948 Comments Letters SIRS,--Messrs. Wagstaffe and Williamson's paper (antea, Vol. xl, p p . 322-325), on t h e cabinet colour changes in bird skins, will be read b y all workers in systematic ornithology with great interest. That these changes occur is of course well known, a...

Notes

01 April 1948 Comments Notes IN a recent volume of British Birds (antea. Vol. xxxix, pp. 212 and 340) records are given of Ravens (Corvus c. corax) nesting in heronries. I should like to record that for several years up to 1942, a pair of Ravens nested in a circle of tall pines cont...

The incubation and fledging-periods of the Razorbill

01 April 1948 Comments Main paper THE incubation-period of the British Razorbill (Alca tarda britannica) does not appear to have been accurately recorded. The Handbook of British Birds (Vol. v, p. 146), quotes the incubation-period as "25 days in incubator (F. G. Paynter), 26-30 (O. A. J....

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Letters

Review

Notes

The Iceland Gull in winter

Nestling mortality amongst tits on Tentsmuir, 1949 and 1950

The formation and persistence of Pairs in the Marsh-Tit

Editorial

Letters

Notes

The incubation and fledging-periods of the Razorbill

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