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.
Fish crow, bird
Rook, raven, jackdaw or crow? Hampshire and Isle of Wight
Black birds that aren't blackbirds
RSPB Pocket Guide to British Birds: : RSPB Marianne Taylor
Bird identification videos BTO - British Trust for Ornithology
Rook Behaviour Guide BTO - British Trust for Ornithology
RSPB Pocket Guide to British Birds: Taylor, Marianne, Message
Rook BTO - British Trust for Ornithology
Bird identification UK - BTO Bird ID guides - British Trust for
Full article: Bird ringing and nest recording in Britain and
de
por adulto (o preço varia de acordo com o tamanho do grupo)
