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Close-up of a Caligo wing. The underwing pattern is highly cryptic.It is conceivable that the eye pattern is a generalized form of mimicry.It is known that many small animals hesitate to go near patterns resembling eyes with a light-colored iris and a large pupil, which matches the appearance of the eyes of many predators that hunt by sight.
Breeding has been recorded as typically February to August, but depending on the portion of this bird's range breeding birds can be met with almost year-round. [11] The nest is a slight depression on a thick tree branch, [ 12 ] at least 10 m (33 ft) above ground, with a single white (slightly spotted) egg measuring about 5.2 cm × 3.8 cm (2.0 ...
The face and throat are pink, darkest on the forehead and above the eye. The bill is horn-coloured, the iris is brown, and the legs and feet are grey. The pink of the A. r. roseicollis is lighter than that of the A. r. catumbella. [3] Juvenile birds have a pale pink face and throat, a greenish fore crown and crown, and the beak has a brownish ...
As the bird attains full maturity over the course of 3–4 years, the iris slowly darkens into a reddish-brown, which is the adult eye-color in all races. [ 5 ] [ 31 ] Seen in flight, adults usually have dark brown along the lower edge of the wings, against a mostly pale wing, which bares light brownish barring.
The eye of a bird is larger compared to the size of the animal than for any other group of animals, although much of it is concealed in its skull. The ostrich has the largest eye of any land vertebrate, with an axial length of 50 mm (2.0 in), twice that of the human eye. [1] Bird eye size is broadly related to body mass.
The yellow beak and eye rings begin to fade to black within their second year. During the first year, the Yucatan jay has an entirely black head and body. The legs, feet, and eye rings remain yellow. The inside of the beak remains white, but takes on a glaucous tone. The wings become bluer, and the tail becomes a purplish blue colour.
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The yellow-eyed pigeon is a medium-sized pigeon growing to a length of about 30 cm (12 in) and a weight of 183 to 234 g (6.5 to 8.3 oz). It is mostly grey, with a slightly brownish tinge to the upper parts and a pinkish-purple sheen on the crown, throat and breast.