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...
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Report on bird-ringing for 1952

01 August 1953
Comments Main paper This is the sixteenth reportf issued on behalf of the Committee, continuing the earlier sequence under the title " The British Birds Marking Scheme." It combines a report on the progress of ringing during 1952, with a selected list of recent recovery reco...
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Report on bird ringing for 1951

01 August 1952
Comments Main paper Bird-Ringing Committee, British Trust for Ornithology. This is the fifteenth r e p o r t ! issued on behalf of the Committee, continuing; the earlier sequence under the title " T h e British Birds Marking S c h e m e . " It is in the form instituted last ...
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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...
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