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The grey crowned crane is closely related to the black crowned crane, and the two species have sometimes been treated as the same species.The two are separable on the basis of genetic evidence, calls, plumage, and bare parts, and all authorities treat them as different species today.
They are large birds with long necks and legs, a tapering form, and long secondary feathers on the wing that project over the tail. [2] Most species have muted gray or white plumages, marked with black, and red bare patches on the face, but the crowned cranes of the genus Balearica have vibrantly-coloured wings and golden "crowns" of feathers. [1]
[3] [4] Linnaeus cited earlier authors including the English naturalist George Edwards who in 1751 had included a description and a hand-colour etching of the "Crowned African Crane" in the fourth volume of his A Natural History of Uncommon Birds. [5] The black crowned crane is now placed together with the grey crowned crane in the genus ...
The bird genus Balearica (also called the crowned cranes or Balearic cranes) contains two extant species in the crane family Gruidae: the black crowned crane (B. pavonina) and the grey crowned crane (B. regulorum). [2] The species today occur only in Africa, south of the Sahara Desert, and are the only cranes that can nest in trees.
They are large birds with long necks and legs, a tapering form, and long secondary feathers on the wing that project over the tail. Most species have muted gray or white plumages, marked with black, and red bare patches on the face, but the crowned cranes of the genus Balearica have vibrantly-coloured wings and golden "crowns" of feathers ...
Except for the head, throat, wings, tail, and thigh feathers, which are black and mostly glossy, the plumage of the hooded crow is ash-grey, with the dark shafts giving it a streaky appearance. The bill and legs are black; the iris dark brown. Only one moult occurs, in autumn, as in other crow species. Male hooded crows tend to be larger than ...
The black-crowned night heron was named the official bird of the city of Oakland, California. [2] Adults are short-necked, short-legged, and stout herons with a primarily brown or grey plumage, and, in most, a black crown. Young birds are brown, flecked with white.
More specifically, the nominate subspecies has a grey forehead, crown, nape, ear-coverts and throat with the face a darker grey-black. The feathers of the throat are longer, giving rise to hackles there. The upperparts and underparts are a brownish-grey and become more brown with age. Towards the belly, the feathers are a paler grey.