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A bare patch of skin that most female birds gain during the nesting season for thermoregulation purposes, by shedding feathers close to the belly, in an area that will be in contact with the eggs during incubation. The patch of bare skin is well supplied with blood vessels at the surface, facilitating heat transfer to the eggs. [56] brood parasite
It has a yellow bill with blue bare skin around the eyes and legs. The sexes are similar in appearance but the male has a longer crest than the female. [ 8 ] The black-winged myna ( Acridotheres melanopterus ), a similar species, has a shorter crest and a much larger area of black on wings and tail, plus a yellow eye-ring (without feathers) and ...
The bare-throated bellbird (Procnias nudicollis) is a species of bird in the family Cotingidae. It is found in moist subtropical and tropical forests in Argentina , Brazil , and Paraguay . The male has white plumage and bristly bluish-black bare skin around its eye, beak and throat.
The striated caracara or Forster's caracara (Phalcoboenus australis) is a Near Threatened bird of prey of the family Falconidae, the falcons and caracaras. [4] [1] It is found in Argentina, Chile, and the Falkland Islands. [5] In the Falklands it is known as the Johnny rook, probably named after the Johnny penguin (gentoo penguin). [6]
The skin patch bears minute feathers arranged in lines that form a pattern over the otherwise bare skin in all species of the genus except the scarlet macaw in which the skin is bare. In most species the bill is black, but the scarlet macaw and green-winged macaw have a predominantly horn coloured upper mandible and a black lower one.
The three species of the genus Chalcopsitta are about 31 – 32 cm (13 in) long. They have long tails, and prominent bare skin at the base of the lower mandible. Males and females have similar external appearance, and juveniles have duller plumage with more marked bare eye-rings.
It is a bird of forests, and is quite secretive despite its size. It has a distinctive call and is often hard to see except for a few seconds when it flushes from the undergrowth. It appears reddish and like a long-tailed partridge. The bare skin around the eye is reddish.
Juveniles are more brown-colored than the adults and overall less bright in color. Young birds do not have the bare skin patch behind the eye. The patch initially develops as pale grey, then transforms to pale yellow, and darkens to pale orange before taking on the adult bright red-orange color as the bird matures.