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Redwing Turdus iliacus migration and wintering areas as shown by recoveries of birds ringed in the breeding season in Fennoscandia, Poland, the Baltic Republics, Russia, Siberia and Iceland

2002; Taylor & Francis; Volume: 21; Issue: 1 Linguagem: Inglês

10.1080/03078698.2002.9674271

2159-8355

R. D. P. Milwright,

Bird parasitology and diseases

Recovery data from nominate Redwings Turdus iliacus ringed in four breeding zones in Europe and Asia are analysed in 10 wintering watershed areas in Europe, North Africa and Asia. Icelandic Redwing data are analysed separately. Nominate Redwing data are heavily biased, with almost 60% originating in Finland (4% of the world breeding range), but less than 1% from Siberia (60% of the breeding range). Large numbers of autumn passage migrants visit "Schelde" (Belgium/northeast France), and "Po" (North Italy), but few winter in these areas. 78% of recoveries are in "West France", "South France/West Italy" or "Iberia". Hunting and habitat adjusted recovery rates indicate that "Gironde" (southwest France) holds the heaviest concentrations of the nominate race. Adult birds are more likely to winter in the more distant areas, Iberia and northwest Africa, Cyprus, the Levant and Transcaucasus. Few ringed nominate Redwings are recovered in Britain or Ireland but adjusted recovery rates suggest these are moderately important wintering areas, where juveniles are more likely to be in England or Wales and adults in Scotland or Ireland. Icelandic Redwings winter almost entirely in Scotland, Ireland, western France and northwest Iberia. Adjusted recovery rates indicate that Ireland is much the most important wintering area for this race. Adults and birds from eastern Iceland are more likely to be recovered in Scotland and Ireland, while first winter birds and those from western Iceland are more likely to be found in France and Iberia. The origin of the large waves of autumn migrants seen in eastern Britain and eastern Spain remains obscure. More ringing is needed to establish the migration and wintering areas of the large Siberian populations.