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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01 March 1932
Comments Notes SOME time ago there was discussion in British Birds on the habit of the male Hedge-Sparrow pecking at the cloaca of the female during courtship display. I have not seen reference to this habit with the House-Sparrow (Passer d. domesticus) and the followi...
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