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California condors' skin on the neck varies in color, depending on the age of the birds. During the breeding season, adult birds' skin color can be cream, pink, yellow, or orange. [4] Most commonly, Andean tend to utilize white or black skin tones, while the California condor leans towards pink.
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 ...
However, the color is also recorded earlier in 1527 as a diagnostic urine color. [3] The word "rufous" is derived from the Latin rufus, meaning "red", and is used as an adjective in the names of many animals—especially birds—to describe the color of their skin, fur, or plumage. [4]
The colors that birds have boil down to evolutionary trade-offs and selective pressures, Prum said. The strongest pressure is what drives a bird’s feathers to be a certain way, Shultz said ...
Bird ringing is the term used in the UK and in some other parts of Europe, while the term bird banding is more often used in the U.S. and Australia. [49] bird strike The impact of a bird or birds with an airplane in flight. [50] body down The layer of small, fluffy down feathers that lie underneath the outer contour feathers on a bird's body. [51]
Most people picture a rooster as a red-combed farm bird that crows at sunrise. But not all chickens fit that mold. Some have jet-black skin, while others have massive dinosaur-like legs—looking ...
Caruncles are carnosities, often of bright colors such as red, blue, yellow or white. They can be present on the head, neck, throat, cheeks or around the eyes of some birds. They may be present as combs or crests and other structures near the beak, or, hanging from the throat or neck. Caruncles may be featherless, or, have small scattered feathers.
In his 1665 book Micrographia, Robert Hooke describes the "fantastical" (structural, not pigment) colours of the Peacock's feathers: [3]. The parts of the Feathers of this glorious Bird appear, through the Microscope, no less gaudy then do the whole Feathers; for, as to the naked eye 'tis evident that the stem or quill of each Feather in the tail sends out multitudes of Lateral branches ...