Jackdaw

While some authors consider Coloeus a subgenus of Corvus, others have classified Coloeus as a distinct genus in the family Corvidae. Following Birds of South Asia: The Ripley Guide, the International Ornithological Congress has also reassigned the two jackdaw species from the genus Corvus to the genus Coloeus. Species The eastern species is smaller than the western, and in eastern adults, the pale areas of the plumage are almost white, whereas in western adults, these areas are pale grey. The iris is pale in the western jackdaw and dark in the Daurian jackdaw. The two species are otherwise very similar in shape, calls, and behaviour. An argument has been made for lumping the two as one species, but they do not interbreed where their ranges meet in Mongolia. ==References==