Ring Ousel Migration

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Abstract
The scale and timing of ring ousel [Turdus torquatus] migration at 7 coastal bird observatories are illustrated by histograms showing at least 10 years'' records aggregated into corresponding 5 day periods. The movement in April on the west coast, and at Spurn Point, mainly involves British breeding birds. The falls at Fair Isle in May are of predominantly Continental birds. At Fair Isle in spring the peak migration of males is earlier than that of females. In autumn the main movements at the west coast are British birds, but in Oct. the large migration on the east coast involves Continental birds. The 58 foreign recoveries of birds ringed in Britain were considered. Most ring ousels were recovered from locations approximately south of Britain. In contrast the recoveries in subsequent migration periods of birds of presumed Scandinavian origin showed a more easterly distribution. The Scandinavian population may normally migrate through Europe on a more easterly route.