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The white-necked puffbird is about 25 cm (9.8 in) long and weighs 81 to 106 g (2.9 to 3.7 oz).It is mostly glossy black. It has a broad white forehead, throat, upper breast, and most of the belly. A broad black band separates the last two, and a black stripe runs from the beak to the crown, passing through a dark red eye.
The facial markings are bold and distinctive, a bright red facial mask is bordered by a black supercilium and moustachial stripe. A white band extends from the chin to behind the eye and the throat is black. A white stripe is present on the breast, and the legs and feet are grey. [4] There is no seasonal variation in plumage. [3] [4]
White-eyes are named for the conspicuous white eye-rings found in the majority of species. [1] [2] [3] Their genus name Zosterops likewise means "eye-girdle".[4]The eye-ring of a bird is a ring of tiny feathers that surrounds the orbital ring, [5] a ring of bare skin immediately surrounding a bird's eye.
There is a white collar around the neck, giving the bird its name. Some races have a white or buff stripe over the eye while others have a white spot between the eye and bill. [10] There may be a black stripe through the eye. The large bill is black with a pale yellow base to the lower mandible. Females tend to be greener than the males ...
The white-eared sibia is an elegant, long-tailed babbler, 22 to 24 cm (8.7–9.4 in) long and weighing an average of 40–50 g (1.4–1.8 oz). [3] [2] The head is black with a conspicuous white stripe through the eye, and the stripe ends in long white filamentous plumes. The wings and tail are deep blue-black, with a noticeable white wingbar.
The body, tail, and wings of the male are uniformly chestnut-brown; its head, neck, and upper breast are white; and it has a black eye-ring, eye-stripe, and bill. Its name comes from the three worm-like wattles of skin that hang from the base of the bill. These wattles can be as long as 10 cm (3.9 in) when extended during songs and interactions.
The male is mainly black above and white below. It has a grey rump, white stripe over the eye, white wing-patches and white on the outer tail-feathers. Females have a similar pattern to the males but are brown instead of black above and have fine black barring on the underparts. The pied triller is similar but is slightly smaller with a broader ...
Adults are mainly olive-green on the upper parts with white underparts; they have a red iris and a grey crown edged with black. There is a dark blackish line through the eyes and a wide white stripe just above that line. They have thick blue-grey legs and a stout bill.