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Notes

01 November 1963 Comments Notes IT has long been known that, in the Common Crossbill (Loxia curvirostra) the mandibles cross indifferently on either side in different individuals. Recently, however, for a special purpose, I desired to ascertain whether or not individuals having the man...

Notes

01 May 1963 Comments Notes FOE some years now I have been paying particular attention to the nestlings of common birds. It is of course now known to all ornithologists that the parents keep the nest clean (as a general rule) by carrying away the excrement, and often by swallowing ...

Notes

01 April 1963 Comments Notes W E have received a good many schedules relating to these two inquiries (see Vol. VI., pp. 296-311, and Vol. VII, pp. 4-6), but we sincerely hope that many more of our readers will send in particulars. This should now be done without delay, and if the fo...

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...

Letters

01 February 1961 Comments Letters The Len Howard Appeal Sirs--All readers of Miss Len Howard's books Birds as Individuals and Living with Birds have been distressed to learn that her life's work is threatened by building on the land next to her garden sanctuary. For twenty-one years Miss ...

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...

Letters

01 August 1952 Comments Letters SIRS,--The Ibis for April 1953 will include a group of papers on Visible Migration (particularly in passerine birds) as observed in various countries. The newly-formed Sub-committee on Visible Migration of the British Trust for Ornithology (see below) fee...

The breeding behaviour of the Swift

01 June 1952 Comments Main paper ...

Visible migration at Land's End

01 March 1952 Comments Main paper THE study of visible migration, initiated by Eagle Clarke (1912), has received a new impetus in the last few years. In October, many Sky-Larks (Alauda arvensis), Chaffinches (Fringilla caslebs) and Starlings (Sturnus vulgaris), with smaller numbers of oth...