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A bird that is naturally white, such as a swan, goose, or egret, is not an albino, nor is a bird that has seasonally alternating white plumage. [17] Four degrees of albinism have been described. The most common form is termed partial albinism, in which local areas of the bird's body, such as certain feathers, are lacking the pigment melanin ...
This feather can grow as a new feather during the bird's infancy, or grow to replace one from moulting. The pin feather looks somewhat like a feather shaft. However, unlike a fully developed feather, the pin feather has a blood supply flowing through it; at this stage, it may also be called a blood feather. As such, if the pin feather is ...
The secretarybird or secretary bird (Sagittarius serpentarius) is a large bird of prey that is endemic to Africa. It is mostly terrestrial, spending most of its time on the ground, and is usually found in the open grasslands and savanna of the sub-Saharan region .
The flight feathers are black with steel blue edgings and the entire underparts are yellow. [9] The underwing coverts are white and the under-tail coverts are a dark dull grey. [ 2 ] The inner webs of the outer 2–3 feather pairs are mostly white forming a large, white, oval-shaped area on the wing undersurfaces. [ 2 ]
The lyrebirds are large passerine birds, amongst the largest in the order. They are ground living birds with strong legs and feet and short rounded wings. They are poor fliers and rarely fly except for periods of downhill gliding. [7] The superb lyrebird is the larger of the two species. Lyrebirds measure 31 to 39 inches in length, including ...
The crest is made up of semiplume feathers: a long rachis with barbs on either side. These are plumulaceous feathers, meaning that they are soft and bendable. In birds, these semiplumes are common along the head, neck, and upper back, and may be used for buoyancy and sensing vibrations. Crests on birds are generally used for display purposes.
The color of their feathers depends on the environment surrounding the bird. [27] Currently, there is no direct correlation between the birds' colors and mate choice. Rather, it plays a bigger role in territory. [28] The northern flicker may also point its bill forward towards a competitor for territorial reasons. [25] Juvenile northern ...
Location of the alula on a bird's wing. The alula / ˈ æ l j ʊ l ə /, or bastard wing, (plural alulae) is a small projection on the anterior edge of the wing of modern birds and a few non-avian dinosaurs. The word is Latin and means "winglet"; it is the diminutive of ala, meaning "wing".