Rooks are highly gregarious birds and are generally seen in flocks
Por um escritor misterioso
Descrição

377 Corvus Frugilegus Stock Video Footage - 4K and HD Video Clips
Rook - eBird

Rook (Corvus frugilegus). Birds of Siberia.
/1841_Birds_F9.3_260.jpg)
Darwin, C. R. ed. 1841. Birds Part 3 of The zoology of the voyage of H.M.S. Beagle. by John Gould. Edited and superintended by Charles Darwin. London: Smith Elder and Co.

Wily Ravens – Over The Edge and Beyond: Journal of a Naturalist

British crow family guide: identification, habitat and species facts

Types Of Birds That Flock Together - A-Z Animals

Rook - BirdWatch Ireland

Rook
de
por adulto (o preço varia de acordo com o tamanho do grupo)