Identifying Rooks BTO - British Trust for Ornithology
Por um escritor misterioso
Last updated 16 julho 2024
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Rook_crow_montage_small.jpg Top left: Juvenile Rook by Breffni Martin. Bottom left: Adult Rook by John Harding. Right:Carrion Crow by Jill Pakenham. (Click to enlarge). Adult Rooks are easy to identify thanks to the bare, greyish-white skin around the base of their bill. The rest of their plumage is all black. A juvenile Rook, however, is similar to a Carrion Crow as it doesn't develop the bare bill-base until its second calendar year. If you're not sure, look for the Rook's characteristic flat forehead, peaked crown, ruffled drooping belly feathers and feathered thighs.
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Rook BTO - British Trust for Ornithology
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State of the art, gaps and future perspectives on common kestrel
BTO British Trust for Ornithology
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Rook (Corvus frugilegus) - British Birds - Woodland Trust
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BTO Publications – Tagged Field Guides – BTO Services Ltd.
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Waders are long-lived birds!
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Rook, raven, jackdaw or crow? Hampshire and Isle of Wight
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Rook, crow or raven? How to tell them apart - Woodland Trust
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Bird identification videos BTO - British Trust for Ornithology
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RSPB Pocket Guide to British Birds: Taylor, Marianne, Message
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Rook BTO - British Trust for Ornithology
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