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.

Monday, July 20, 2009

Harpy Eagle




Harpy Eagle

The Harpy Eagle (Harpia harpyja), sometimes known as the American Harpy Eagle, is a Neotropical species of eagle. This species was first described by Linnaeus in his Systema naturae in 1758 as Vultur harpyja. It is the only member of the genus Harpia.

It is the largest and most powerful raptor found in the Americas, and among the largest extant species of eagles in the world. It usually inhabits tropical lowland rainforests in the upper (emergent) canopy layer.

Its name references the harpies from Ancient Greek mythology. These were wind spirits that took the dead to Hades, and were said to have a body like an eagle and the face of a human.

The upperside of the Harpy Eagle is covered with slate black feathers, and the underside is with white. There is a black band across the chest up to the neck. The head is pale grey, and is crowned with a double crest. The plumage of male and female is identical. The talons are up to 13 cm (5 in) long.

Female Harpy Eagles typically weigh 6.5 kg to 9 kg (14 to 20 lbs). One exceptional captive female, "Jezebel", weighed 12.3 kg (26 lb), possibly because of relative lack of exercise and readily available food at a zoo. The male, in comparison, weighs only about 3.8 kg to 5.4 kg (8.5 lb to 12 lb).

Harpy Eagles are 89-105 cm (2.94-3.43 ft) long and have a wingspan of approximately 200 cm (6 ft, 7 in). Among extant species, only the Philippine Eagle and the Steller's Sea Eagle approach similar dimensions, although the wingspan of the Harpy Eagle is relatively small (an adaptation that increases manoeuvrability in forested habitats) and is matched or surpassed by other species. The extinct Haast's Eagle was significally larger than the Harpy.

Sunday, July 19, 2009

Black-headed Gull

Laughing Gull is Laughing!
Black-headed Gull by eskimo_jo

The Black-headed Gull (Chroicocephalus ridibundus) is a small gull which breeds in much of Europe and Asia, and also in coastal eastern Canada. Most of the population is migratory, wintering further south, but some birds in the milder westernmost areas of Europe are resident. Some birds will also spend the winter in northeastern North America, where it was formerly known as the Common Black-headed Gull. As is the case with many gulls, it has traditionally been placed in the genus Larus.

This gull is 38-44 cm (15-17½ in) long with a 94-105 cm (37-41 in) wingspan. It breeds in colonies in large reedbeds or marshes, or on islands in lakes, nesting on the ground. Like most gulls, it is highly gregarious in winter, both when feeding or in evening roosts. It is not a pelagic species, and is rarely seen at sea far from coasts.

I Am Beautiful...
Black-headed Gull by Fifi1968

The Black-headed Gull is a bold and opportunist feeder and will eat insects, fish, seeds, worms, scraps and carrion. in towns or take invertebrates in ploughed fields with equal relish.

In flight, the white leading edge to the wing is a good field mark. The summer adult has a chocolate-brown head (not black, despite the name), pale grey body, black tips to the primary wing feathers, and red bill and legs. The hood is lost in winter, leaving just dark vertical streaks.

This species takes two years to reach maturity. First year birds have a black terminal tail band, more dark areas in the wings, and, in summer, a less fully developed dark hood. Like most gulls, Black-headed Gulls are long-lived birds, with a maximum age of 63 years recorded in the wild.

This is a noisy species, especially at colonies, with a familiar "kree-ar" call. Its scientific name means "Laughing Gull".

The Black-headed Gull is the prefectural bird of Tokyo and the Yurikamome mass transit system is named after it.

Saturday, July 18, 2009

Indian Peafowl

Indian Peafowl
Indian Peafowl by Hobby-Photograph

The Indian Peafowl, Pavo cristatus, also known as the Common Peafowl or the Blue Peafowl, is one of the species of bird in the genus Pavo of the Phasianidae family known as peafowl. The Indian Peafowl is a resident breeder in the Indian subcontinent and has been introduced into many parts of the world and feral populations exist in many introduced regions. The peacock is the national bird of India.

The species is found in dry semi-desert grasslands, scrub and deciduous forests. It forages and nests on the ground but roosts on top of trees. It eats seeds, insects, fruits, small mammals and reptiles.

Females are about 86 cm (34 in) long and weigh 2.75-4 kg (6-8.8 lbs), while males average at about 2.12 m (7.3 ft) in full breeding plumage (107 cm/42 in when not) and weigh 4-6 kg (8.8-13.2 lbs). The male is called a peacock, the female a peahen. The Indian Peacock has iridescent blue-green plumage. The upper tail coverts on its back are elongated and ornate with an eye at the end of each feather.

These are the Peacock's display feathers. The female plumage is a mixture of dull green, grey and iridescent blue, with the greenish-grey predominating. In the breeding season, females stand apart by lacking the long 'tail feathers' also known as train, and in the non-breeding season they can be distinguished from males by the green colour of the neck as opposed to the blue on the males.

Indian Peafowl (Pavo cristatus) male
Indian Peafowl by Lip Kee

Peafowl are most notable for the male's extravagant display feathers which, despite actually growing from their back, are known as a 'tail' or train. This train is in reality not the tail but the enormously elongated upper tail coverts. The tail itself is brown and short as in the peahen. The colours result from the micro-structure of the feathers and the resulting optical phenomena.

The ornate train is believed to be the result of female sexual selection as males raised the feathers into a fan and quiver it as part of courtship display. Many studies have suggested that the quality of train is an honest signal of the condition of males and that peahens select males on the basis of their plumage. More recent studies however, suggest that other cues may be involved in mate selection by peahens.

They lay a clutch of 4-8 eggs which take 28 days to hatch. The eggs are light brown and are laid every other day usually in the afternoon. The male does not assist with the rearing, and is polygamous with up to six hens.

Thursday, July 16, 2009

Red-bellied Woodpecker

Red-Bellied Woodpecker (Melanerpes carolinus )
Red-bellied Woodpecker by pinnicktabor

The Red-bellied Woodpecker, Melanerpes carolinus, is a medium-sized woodpecker of the Picidae family. It breeds in southern Canada and the northeastern United States, ranging as far south as Florida and as far west as Texas. Its common name is somewhat misleading, as the most prominent red part of its plumage is on the head; the Red-headed Woodpecker however is another species that is a rather close relative but looks entirely different.

It was first described in Linnaeus' Systema Naturae, as Picus carolinus. The type locality is given simply as "America septentrionalis" (North America).

red-bellied woodpecker (melanerpes carolinus)
Red-bellied Woodpecker by joghadban

Description

Adults are mainly light gray on the face and underparts; they have black and white barred patterns on their back, wings and tail. Adult males have a red cap going from the bill to the nape; females have a red patch on the nape and another above the bill. The reddish tinge on the belly that gives the bird its name is difficult to see in field identification. They are 9 to 10.5 inches long, and have a wingspan of 15 to 18 inches.

Vocalizations

Red-bellied woodpeckers are noisy birds, and have many varied calls. Calls have been described as sounding like churr-churr-churr or chuf-chuf-chuf with an alternating br-r-r-r-t sound. Males tend to call and drum more frequently than females, but both sexes call. Often, these woodpeckers "drum" to attract mates. They tap on aluminum roofs, metal guttering, hollow trees and even transformer boxes, in urban environments, to communicate with potential partners.

Sunday, July 12, 2009

Black-chinned Hummingbird

BLACK-CHINNED HUMMINGBIRD
Black-chinned Hummingbird by k.nanney

Black-Chinned Hummingbird, Archilochus alexandri
Black-chinned Hummingbird by tripp.davenport

The Black-chinned Hummingbird (Archilochus alexandri) is a small hummingbird.

Adults are metallic green above and white below with green flanks. Their bill is long, straight and very slender. The adult male has a black face and chin, a glossy purple throat band and a dark forked tail. The female has a dark rounded tail with white tips and no throat patch; they are similar to female Ruby-throated Hummingbirds.

Their breeding habitat is open semi-arid areas near water in the western United States, northern Mexico and southern British Columbia. The female builds a well-camouflaged nest in a protected location in a shrub or tree using plant fibre, spider webs and lichens.

They are migratory and spend most of the winter in Mexico.

These birds feed on nectar from flowers using a long extendable tongue or catch insects on the wing. While collecting nectar, they also assist in plant pollination.

Because of their small size, they are vulnerable to insect-eating birds and animals. This bird is fairly common in its breeding range.

A hybrid between this species and Anna's Hummingbird was called "Trochilus" violajugulum. The Black-chinned Hummingbird is also known to hybridize with Costa's Hummingbird. The Black-chinned humming bird is 8.25 cm (3 1/4 inches) long.

Saturday, July 11, 2009

Bobolink

Bobolink
Bobolink by Marty Jones

The Bobolink, Dolichonyx oryzivorus, is a small New World blackbird and the only member of genus Dolichonyx.

Adults are 16–18 cm (6–8 in) long with short finch-like bills. Adult males are mostly black, although they do display creamy napes, and white scapulars, lower backs and rumps. Adult females are mostly light brown, although their coloring includes black streaks on the back and flanks, and dark stripes on the head; their wings and tails are darker. The collective name for a group of bobolinks is a chain.

Their breeding habitats are open grassy fields, especially hay fields, across North America. In high-quality habitats, males are often polygynous. Females lay 5 to 6 eggs in a cup-shaped nest, which is always situated on the ground and is usually well-hidden in dense vegetation. Both parents feed the young.

These birds migrate to Argentina, Bolivia and Paraguay. They often migrate in flocks, feeding on cultivated grains and rice, which leads to them being considered a pest by farmers in some areas. Although Bobolinks migrate long distances, they have rarely been sighted in Europe—like many vagrants from the Americas, the overwhelming majority of records are from the British Isles

Bobolinks forage on, or near the ground, and mainly eat seeds and insects.

Males sing bright, bubbly songs in flight; these songs gave this species its common name.

Bobolink
Bobolink by kellycolganazar

The numbers of these birds are declining due to loss of habitat. Originally, they were found in tall grass prairie and other open areas with dense grass. Although hay fields are suitable nesting habitat, fields which are harvested early, or at multiple times, in a season may not allow sufficient time for young birds to fledge. This species increased in numbers when horses were the primary mode of transportation, requiring larger supplies of hay.

Thursday, July 9, 2009

Tufted Titmouse

Tufted Titmouse
Tufted Titmouse by wwcsig

The Tufted Titmouse, Baeolophus bicolor, is a small songbird from North America, a species in the tit and chickadee family (Paridae). The Black-crested Titmouse, found from central and southern Texas southwards, was included as a subspecies but is now considered a separate species B. atricristatus.

These birds have grey upperparts and white underparts with a white face, a grey crest, a dark forehead and a short stout bill; they have rust-coloured flanks. The song is usually described as a whistled peter-peter-peter. They make a variety of different sounds, most having a similar tone quality.

The habitat is deciduous and mixed woods as well as gardens, parks and shrubland in the eastern United States; they barely range into southeastern Canada in the Great Lakes region. They are all-year residents in the area effectively circumscribed by the Great Plains, the Great Lakes, the Gulf of Mexico and the Atlantic Ocean. The range is expanding northwards, possibly due to increased availability of winter food at bird feeders. Global warming may be another factor; the birds are nowadays resident all year even in rural Ohio where there are few bird feeders, while it was noted around 1905 that many birds from these areas migrated south in winter.

Tufted Titmouse
Tufted Titmouse by Tony Tanoury

They forage actively on branches, sometimes on the ground, mainly eating insects, especially caterpillars, but also seeds, nuts and berries. They will store food for later use. Tufted titmice tend to be curious about their human neighbors and can sometimes be spotted on window ledges peering into the windows to watch what's going on inside. They are more shy when seen at bird feeders; their normal pattern there is to scout the feeder from the cover of trees or bushes, fly to the feeder, take a seed, and fly back to cover to eat it.

Tufted Titmice nest in a hole in a tree, either a natural cavity or sometimes an old woodpecker nest. They line the nest with soft materials, sometimes plucking hair from a live animal such as a dog. If they find shed snake skin, they will try to incorporate pieces of it in their nest. Sometimes, a bird born the year before remains to help its parents raise the next year's young. The pair may remain together and defend their territory year-round. These birds are permanent residents and often join small mixed flocks in winter.

Tuesday, July 7, 2009

Bank Swallow

Bank Swallows (Riparia riparia)
Bank Swallow by corbeau_du_nord

The Sand Martin (Riparia riparia) / Bank Swallow is a migratory passerine bird in the swallow family. It has a wide range in summer, embracing practically the whole of Europe and the Mediterranean countries, part of northern Asia and also North America. It winters in eastern and southern Africa, South America and South Asia. It is known as Bank Swallow in North America, and as Collared Sand Martin in South Asia, and sometimes as European Sand Martin.

Bank Swallow
Bank Swallow by Keith Carlson

The 12-cm-long Sand Martin is brown above, white below with a narrow brown band on the breast; the bill is black, the legs brown. The young have rufous tips to the coverts and margins to the secondaries.

Its brown back, white throat, small size and quick jerky flight separate it at once from similar swallows, such as the House Martin (Delichon urbicum), the Cliff Swallow (Petrochelidon pyrrhonota) or other species of Riparia. Only the Banded Martin (R. cincta) of sub-Saharan Africa is similar, but the Sand Martin only occurs there in winter.

The Pale Martin is the subspecies diluta of northern India and southeastern China is sometimes split as a separate species Riparia diluta. It has paler grey-brown upperparts and a less distinct breast band. It winters in Pakistan and southern India.

The Sand Martin's twittering song is continuous when the birds are on the wing, and becomes a conversational undertone after they have settled in the roost. The harsh alarm is heard when a passing falcon, crow or other suspected predator requires combined action to drive it away.

This species was first described by Linnaeus in his Systema naturae in 1758, and originally named Hirundo riparia; the description consisted of the simple H[irundo] cinerea, gula abdomineque albis – "an ash-grey swallow, with white throat and belly" –, and the type locality was simply given as "Europa". The specific name means "of the riverbank"; it is derived from the Latin ripa "riverbank".

Sunday, July 5, 2009

Black-crested Titmouse

black-crested titmouse (baeolophus atricristatus)
Black-crested Titmouse by revs&audy

The Black-crested Titmouse, Baeolophus atricristatus (also known as the Mexican Titmouse), is a small songbird, a passerine bird in the tit family Paridae. Once considered a subspecies of the Tufted Titmouse (B. bicolor), it is now recognized as a separate species. It is native to southern Texas, Oklahoma, and east-central Mexico and has been seen as far north and east as St. Louis.

black-crested titmouse (baeolophus atricristatus)
Black-crested Titmouse by revs&audy

The bird is 5.5 to 6 inches long, with rusty flanks, gray upperparts, and a whitish belly. The male has a long, dark black crest that is usually erect, while the female's crest is not as dark. It is common wherever trees grow, whether they are deciduous, heavy timber, or urban shade trees. Its call peter, peter, peter is similar to that of the Tufted Titmouse, but shorter. Its diet consists of berries, nuts, spiders, insects, and insect eggs.

The Black-crested Titmouse nests in tree cavities, telephone poles, fence posts, and bird boxes. The eggs, four to seven of which are laid in March or April, are white with reddish-brown spots.

California Condor

Captive California condor at Wild Animal Park, San Diego Zoo
California Condor by Martin LaBar

The California Condor (Gymnogyps californianus) is a North American species of bird in the New World vulture family Cathartidae and the largest North American land bird. Currently, this condor inhabits only the Grand Canyon area, Zion National Park, and western coastal mountains of California and northern Baja California. Although other fossil members are known, it is the only surviving member of the genus Gymnogyps.

California Condor
California Condor by auntie rain

It is a large, black vulture with patches of white on the underside of the wings and a largely bald head with skin color ranging from yellowish to a bright red, depending on the bird's mood. It has the largest wingspan of any bird found in North America and is one of the heaviest. The condor is a scavenger and eats large amounts of carrion. It is one of the world's longest-living birds, with a lifespan of up to 50 years.

California Condor
California Condor by GlennHightree

Condor numbers dramatically declined in the 19th century due to poaching, lead poisoning, and habitat destruction. Eventually, a conservation plan was put in place by the United States government that led to the capture of all the remaining wild condors in 1987. These 22 birds were bred at the San Diego Wild Animal Park and the Los Angeles Zoo. Numbers rose through captive breeding and, beginning in 1991, condors have been reintroduced into the wild. The project is the most expensive species conservation project ever undertaken in the United States. The California Condor is one of the world's rarest bird species. As of April 2009, there are 322 condors known to be living, including 172 in the wild.

The condor is a significant bird to many Californian Native American groups and plays an important role in several of their traditional myths.

American Coot

american-coot
American Coot by mikebaird

The American Coot (Fulica americana) is a bird of the family Rallidae, inhabiting wetlands and open water bodies. About 16 inches (40 cm) in length and weighing 1.4 lb (0.65 kg), adults have a short thick white bill and white frontal shield, which usually has a reddish-brown spot near the top of the bill between the eyes. From up close, a dark band can be distinguished at the billtip.

The body is grey with the head and neck darker than the rest of the body. Their legs are yellowish, with scalloped toes rather than webbed feet. Their chicks have black bodies with bright red head and beak, and orange plumes around the neck. The call is a high-pitched squeaking honk somewhat like a goose's but more hollow sounding.

Friday, July 3, 2009

Eurasian Collared Dove

Eurasian Collared Dove
Eurasian Collared Dove by Keith Alderman

The Eurasian Collared Dove, Streptopelia decaocto, also spelled Eurasian Collared-Dove or called simply the Collared Dove, is one of the great colonisers of the avian world. Its original range was warmer temperate regions from southeastern Europe to Japan. However, in the twentieth century it expanded across the rest of Europe, reaching as far west as Great Britain by 1953; breeding in Britain for the first time in 1956, and Ireland soon after. It also now breeds north of the Arctic Circle in Scandinavia. It is not migratory.

Eurasian Collared Dove
Eurasian Collared Dove by Keith Alderman

It was introduced into the Bahamas in the 1970s and spread to Florida by 1982. Its stronghold in North America is still the Gulf Coast, but it is now found as far south as Veracruz, as far west as California, and as far north as British Columbia, the Great Lakes, and Central Saskatchewan. Its impact on native species is as yet unknown; it appears to occupy an ecological niche between that of the Mourning Dove and Rock Pigeon; some have suggested that its spread represents exploitation of a niche made available by the extinction of the Passenger Pigeon.

Eurasian Collared Dove (Streptopelia decaocto)
Eurasian Collared Dove by William Richardson

It breeds wherever there are trees for nesting, laying two white eggs in a stick nest. The eggs are incubated by the female during the night and by the male during the day. Incubation lasts 14-18 days, and young fledge after 15-19 days. It is not wary and is often found around human habitation.

Eurasian Collared Dove
Eurasian Collared Dove by Snakelover61

This is a medium sized dove, color in the range of buff grey with a darker back and a blue-grey underwing patch. It is substantially larger than the common Mourning Dove, and larger specimens may exceed six ounces in weight, and exceed fourteen inches in length from tip of beak to tip of tail, with a wingspan that occasionally exceeds 18 inches. The tail feathers are tipped white. It has a black half-collar on its nape from which it gets its name. The short legs are red and the bill is black. The iris is reddish brown, but from a distance the eyes appear to be black, as the pupil is relatively large and only a narrow rim of reddish-brown eye colour can be seen around the black pupil.

This is a gregarious species, and sizable winter flocks will form where there are food supplies such as grain. The song is a coocoo, coo repeated many times. It is phonetically similar to the Greek, decaocto ('eighteen'), to which the bird owes its name. Occasionally it also makes a harsh loud mechanical-sounding call lasting about 2 seconds, particularly when landing in the summer.

The males have an unusual mating display, consisting of a rapid nearly vertical climb to height, followed by a long glide downward in a spiral. At all other times, flight is typically direct without gliding.

The Eurasian Collared Dove is one of two species (the other, and the more likely, being the African Collared Dove, Streptopelia roseogrisea) that have been argued to be the wild ancestor of the domestic Barbary Dove, S. risoria. It is able to interbreed with the Barbary Dove.

Wednesday, July 1, 2009

Hooded Oriole

Hooded Oriole
Hooded Oriole by lselman

The Hooded Oriole, Icterus cucullatus, is a medium-sized New World oriole.

Adults have a pointed bill and white wing bars. The adult male has an orange head with black on the face and throat; they are black on the back, wings and tail, orange on the underparts. The adult female is olive-green on the upper parts, yellowish on the breast and belly.

Their breeding habitat is open areas with trees, especially palms, across the southwestern United States and northern Mexico. The nest is a tightly woven pouch attached to the underside of a leaf or tree branch.

These birds migrate in flocks south to Mexico's southwestern coast; they are permanent residents in Baja California Sur, the Mexican east coast, and Belize. Some may over-winter near feeders.

They forage in trees and shrubs, also feeding from flowers. Because it pierces the base of the flower, it does not assist in pollination. These birds mainly eat insects, nectar and fruit, and will also visit hummingbird feeders.