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Documents disponibles écrits par cet auteur (4)
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Article
Iain G. Main, AuteurThe feasibility of using ring recovery data to distinguish obligate and facultative partial migration is examined. Possible approaches involve (1) the observation of temporal change in the proportion of migrant individuals, and (2) the identific[...]
Article
Iain G. Main, AuteurRing recoveries from Greenfinches making overseas movements to and from Britain are analysed. On average, approximately 0.1% of all British Greenfinches move to Ireland for the winter, and an estimated 2% or more of those breeding in southeast E[...]
Article
Iain G. Main, AuteurRecoveries provided by 14 ringing schemes have been used to investigate the partial migration of Norwegian, Swedish, Finnish and Danish Greenfinches Carduelis chloris. More and longer seasonal movements are made by females than by males, and fir[...]
Article
Iain G. Main, AuteurRecoveries provided by 15 European ringing schemes have been used to investigate the seasonal movements of Danish, Norwegian, Swedish and Finnish Blackbirds Turdus merula. All populations are partially migratory, estimated minimum migrant fracti[...]
