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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....

The Clutch-size of the Yellowhammer

01 December 1946 Comments Main paper IN I044 one of us (K.P.) undertook an intensive study of the nesting of the Yellowhammer {Emberiza ciirinclla) near Oxford. In conversation, it was found that this confirmed the seasonal variations in clutch-size found for the Robin (Erithacus rubccula) b...

Notes

01 September 1946 Comments Notes THE habit of sun-bathing by passerine birds.is discussed in a note by T. S. Williams (antea, p. 152). As indicated in the Editorial comment thereto this is probably commoner than at first sight appears to be the case. To the list of species given I can a...

Notes

01 March 1946 Comments Notes O N March ijth, 1945, I was in a convoy moving slowly south through the'Irish Sea. The day was brilliantly fine, the sea quite calm. In the morning the Welsh Hills were visible, but otherwise we saw neither coast. There was no fog, however. There was a v...

Notes

01 December 1944 Comments Notes I HAVE previously (antea, Vol. xxxiii, p. 265) given examples from the Robin (Erithacus rubecula) and the Blackcock (Lyrurus tetrix) of a male attempting to disturb the coition of another pair. Similar behaviour is characteristic of geese and swans, as n...

Notes

01 November 1944 Comments Notes ALTHOUGH Carrion-Crows (Corvus c. cowrie) and Rooks (Corvus f, frugilegws) have been recorded occasionally as nesting on electric pylons, it may be of interest to record that as a result of observations by Mr. A. E. Billett at Weston-super-Mare, Somerset...

Changes in Status among British breeding Birds

01 October 1944 Comments Main paper STONE-CURLEW (Burhinus ce. cedicnemus). In second half of 19th century became extinct in Cotswolds (Gloucestershire and N.W. Oxfordshire) and in E. Midlands (Leicestershire, Rutland, Nottinghamshire and Lincolnshire). Has decreased elsewhere (almost extin...

Changes in Status among British breeding Birds

01 August 1944 Comments Main paper IN view of the present interest in animal fluctuations, a survey has been "made of every bird breeding in the British Isles, to see what proportion of the species have increased, decreased or remained at about the same level during the last one, hundred y...

Notes

01 April 1943 Comments Notes MARTINSON of Foresters Lodge, Wolsingham, in the Wear valley, rcports that from January ioth to 28th, 1943, he had under Observation five Two-barred Crossbills (Loxia l. bifasciala). Flocks of the Common Crossbill (Loxia c. curvirostra) have been present...

Notes on the spring Territory of the Blackbird

01 August 1941 Comments Main paper study was made on the Dartington Hall estate, South Devon, in 1940, when the abnormal cold weather in late January and early February made possible the trapping and colour-ringing of an unusually large number of Blackbirds (Turdus m. tnerula). Unfortunate...

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The incubation and fledging-periods of the Razorbill

The Clutch-size of the Yellowhammer

Notes

Notes

Notes

Notes

Changes in Status among British breeding Birds

Changes in Status among British breeding Birds

Notes

Notes on the spring Territory of the Blackbird

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