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Article
The size and migratory origins of the population of Hen Harriers Circus cyaneus wintering in England
Andrew D. M. Dobson, Auteur ; Michele Clarke, Auteur ; Nils Kjellen, Auteur ; Roger Clarke, AuteurCapsule The majority of Hen Harriers Circus cyaneus that spend the winter in England are derived from the British breeding population. Aims To investigate the popular hypothesis that Hen Harriers which over-winter in England are derived principa[...]
Article
Andrew D. M. Dobson, Auteur ; Michele L. Clarke, AuteurThe Hen Harrier Circus c. cyaneus and Northern Harrier C. cyaneus hudsonius are classified as conspecifics by some modern authors and as separate species by others. The tendency to treat the two as conspecifics may have its origin in erroneous n[...]
