Thursday, July 30, 2009

White-winged Dove

White-winged Dove
White-winged Dove by ru_24_real

The White-winged Dove (Zenaida asiatica) is a dove whose native range extends from the south-western USA through Mexico and the Caribbean. It has also been introduced to Florida.

Most populations of White-winged Doves are migratory, wintering in Mexico and Central America. The White-winged Dove inhabits scrub, woodlands, desert, and cultivated areas. It builds a flimsy stick nest in a tree and lays two cream-colored to white, unmarked eggs. Its flight is fast and direct, with the regular beats and occasional sharp flick of the wings that are characteristic of pigeons in general.

White-winged Doves are large, chunky pigeons at 29 cm. They are brownish-gray above and gray below, with a bold white wing patch that appears as a brilliant white crescent in flight and is also visible at rest. Adults have a patch of blue, featherless skin around each eye and a long, dark mark on the lower face. Their eyes, legs, and feet are red.

Both sexes are similar, but juveniles are grayer than adults. They have no blue eye ring and their legs and feet are brownish pink.

White-winged Doves feed on a variety of seeds, grains, and fruits. Western White-winged Doves (Zenaida asiatica mearnsii) migrate into the Sonoran Desert to breed during the hottest time of the year because they feed on pollen and nectar, and later on the fruits and seeds of the Saguaro cactus. This gregarious species can be an agricultural pest, descending on grain crops in large flocks. It is also a popular gamebird in areas of high population.

The cooing calls are who-cooks-for-you and hoo hoo hoo.

Monday, July 27, 2009

Belted Kingfisher

Belted Kingfisher
Belted Kingfisher Male by Beakspeak

The Belted Kingfisher (Megaceryle alcyon) is a large, conspicuous and noisy water kingfisher, the only member of that group commonly found in the northern United States and Canada. It is depicted on the 1986 series Canadian $5 note. All kingfishers were formerly placed in one family, Alcedinidae, but recent research suggests that this should be divided into three. All six American kingfishers, together with three Old World species, make up the new family Cerylidae.

Belted Kingfisher
Belted Kingfisher Female by birdie1925

Description

The Belted Kingfisher is a stocky, medium-sized bird that measures between 28–35 cm (11–14 in) in length with a wingspan of between 48–58 cm (19–23 in). Birds usually weigh 140–170 g (4.9–6 oz).

This species has a large head with a shaggy crest. Its long, heavy bill is black with a grey base. This kingfisher shows reverse sexual dimorphism, with the female more brightly coloured than the male. Both sexes have a slate blue head, large white collar, a large blue band on the breast, and white underparts. The back and wings are slate blue with black feather tips. The female features a rufous band across the upper belly that extends down the flanks. Juveniles of this species are similar to adults, but both sexes feature the rufous band on the upper belly. Juvenile males will have a rufous band that is somewhat mottled while the band on females will be much thinner than that on adult females.

Distribution and habitat

This bird's breeding habitat is near inland bodies of waters or coasts across most of Canada, Alaska and the United States. They migrate from the northern parts of its range to the southern United States, Mexico, Central America, the West Indies and northern South America in winter. During migration it may stray far from land; the species is recorded as an accidental visitor on oceanic islands such as Clarion, and has occurred as an extremely rare vagrant in Iceland, Ireland and the United Kingdom.

It leaves northern parts of its range when the water freezes; in warmer areas it is a permanent residents. A few individuals may linger in the north even in the coldest winters except in the Arctic, if there are remaining open bodies of water.