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Inconsistency in the taxonomy of Hen and Northern Harriers: causes and consequences

Andrew D. M. Dobson, Auteur ; Michele L. Clarke, Auteur

Dans British Birds (104(4) APR 2011)

The 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[...]

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