Identifying Rooks BTO - British Trust for Ornithology
Por um escritor misterioso
Descrição
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.
Rook BTO - British Trust for Ornithology
Rook BTO - British Trust for Ornithology
How To Identify Bird Egg Shells - Woodland Trust
Identification of Juvenile Rooks and Carrion Crows - Corvid Isle
Black birds that aren't blackbirds
How to identify bird and mammal nests - Discover Wildlife
BTO Publications – Tagged Field Guides – BTO Services Ltd.
Bird identification UK - BTO Bird ID guides - British Trust for
Identify crows Wildlife Watch
RAVEN (Corvus corax) - songbird factfile
de
por adulto (o preço varia de acordo com o tamanho do grupo)
