Rooks, ravens and relations - BirdGuides
Por um escritor misterioso
Descrição
A comprehensive genetic analysis of all the recognised species and many subspecies of the cosmopolitan crow genus Corvus has been performed with some surprising results.
Rook Bird Facts (Corvus frugilegus)
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Rook Bird Facts (Corvus frugilegus)
Details : Raven - BirdGuides
Details : Rook - BirdGuides
British crow family guide: identification, habitat and species
Rook, crow or raven? How to tell them apart - Woodland Trust
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