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Surfbirds The Backyard Bird Experts!
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Ducks, Geese, Grebes, Pelicans of North America |
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The Pied-billed Grebe, (Podilymbus podiceps)[1], is a member of the grebe family of water birds. Since the Atitlán Grebe, Podilymbus gigas, has become extinct, it is the sole extant member of the genus Podilymbus. Folk names of this grebe include dabchick, devil-diver, dive-dapper, hell-diver, and water witch Photo © Sean Cronin |
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The Double-crested Cormorant is a large black bird 74–91 cm (29"–36") long, with a wingspan up to 132 cm (52"). It has a long tail and a yellow throat-patch, and can appear to have a green sheen in certain lighting. The white double head crest is seen for a short period during the breeding season in western birds; it is duller in eastern birds. Juveniles are brown with a white face, foreneck, and breast. A very common and widespread species, it winters anywhere that is ice-free along both coasts, as far north as southern Alaska (on the west coast) and southern New England (on the east coast). It can be found as far south as Mexico and the Bahamas. It migrates from the coldest parts of its breeding range, such as eastern Canada, and has occurred in Europe as a very rare vagrant, for example in Great Britain, Ireland and the Azores. Photo © Marcus Lawson |
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This species is 90-100 cm long with a 160-175 cm wing span. Males weigh 3.5–6.5 kg, (8–14 pounds ), and can be very aggressive in defending territory. A pair may mate for life (around 20 years). The female looks virtually identical but is slightly lighter at 3–5.5 kg (7–12 pounds), and has a different honk. Photo © Steve Robinson Photo © Matthew Berriman |
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This dabbling duck is 56-65 cm length, with an 81–98 cm wingspan, and weighs 750–1000 g. It is strongly migratory in the northern parts of its breeding range, and winters farther south. It is highly gregarious outside of the breeding season and will form large flocks. They are exceptionally fast flyers for their size, reaching speeds of 40mph. Due to their streamlining however, it hardly ruffles a feather. Mallards frequently interbreed with the American Black Duck, Northern Pintail and domesticated species, leading to various hybrids. A Mallard has been recorded as living for 29 years. Photo © Lee Davis Photo © Jon Hall |
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This dabbling duck is strongly migratory and winters further south than its breeding range as south as in Texas and Louisiana coast of the Gulf of Mexico. It is a rare but regular vagrant to western Europe. It is highly gregarious outside of the breeding season and will form large flocks. The breeding male has pinkish flanks and breast back, with a black rear end and a brilliant white speculum, obvious in flight or at rest. It has a greyish head with a green eye patch and a whitish crown stripe. It is 18-23" long. The females are light brown, with plumage much like a female Mallard. They can be distinguished from most ducks, apart from European Wigeon on shape. However, that species has a darker head and all grey underwing. Photo © Sue and Andy Tranter |
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Their breeding habitat is marshes from southern Quebec to the Pacific coast of North America and as far south as northern South America. They nest in a well-concealed location in tall reeds. They are frequently seen swimming in open water. They migrate from northern locations to the southern United States and southern British Columbia. They are often year-round residents where water remains open in winter. These birds can dive for food but can also forage on land. They are omnivores, eating plant material, insects, fish, and other aquatic animals. Adults mostly consume "pond scum". Their call is a high-pitched squeaking honk somewhat like a goose's but more hollow sounding. American coots are highly territorial during the breeding season, with both males and females fighting with neighbors to maintain a small territory where they obtain all their food. The females are known to lay eggs in neighbors' nests (known as conspecific brood parasitism). Photo © Mark S. Szantyr |
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This is a common breeding bird in marshy environments and well-vegetated lakes. It is often secretive, but can become tame in some areas. Populations in areas where the waters freeze, such as southern Canada, the northern USA and eastern Europe, will migrate to more temperate climes. This is a distinctive species, with dark plumage apart from the white undertail, yellow legs and a red facial shield. The young are browner and lack the red shield. It has a wide range of gargling calls. This species will consume a wide variety of vegetable material and small aquatic creatures. They forage while swimming, sometimes upending to feed, or walking through the marsh. The nest is a roofed basket built on the ground in dense vegetation. 4-8 eggs are laid, which are incubated for about three weeks. Both parents incubate and feed the young. More than one brood may be raised in a year. Despite loss of habitat in parts of its range, this bird remains common and widespread. Photo © Neil Loverock |
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Unlike the Brown Pelican, the American White Pelican does not dive for its food. Instead it practices cooperative fishing. Each bird eats more than 4 pounds of fish a day, mostly carp, chubs, shiners, yellow perch, catfish, and jackfish. White Pelicans nest in colonies of several hundred pairs on islands in remote brackish and freshwater lakes of inland North America. The female lays 2 or 3 eggs in a shallow depression on the ground. Both parents incubate. They winter in central California and along the Pacific coast of Guatemala; also along the shores of the Gulf of Mexico. Photo © Pete Morris/Birdquest |
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It lives strictly on coasts from Washington and Cape Cod to the mouth of the Amazon River. Some immature birds may stray to inland freshwater lakes. After nesting, North American birds move further north along the coasts in flocks, returning to warmer waters for winter. This bird is distinguished from the American White Pelican by its brown body and its habit of diving for fish from the air, as opposed to co-operative fishing from the surface. It dines mostly on herring-like fish. Groups of these birds often travel in single file, flying low over the water's surface. The nest location varies from a simple scrape on the ground on an island to a bulky stick nest in a low tree. These birds nest in colonies, usually on islands. Pesticides like DDT and dieldrin threatened its future in the southeast United States and California in the early 1970s. Pesticides also threatened the pelican population in Florida in this time period. A research group from the University of Tampa headed up by Dr. Ralph Schreiber conducted research in the Tampa Bay/St Petersburg area and found that DDT caused the pelican eggshells to be overly-thin and incapable of supporting the embryo to maturity. As a result of this research, DDT usage was eliminated in Florida and the rest of the country. It is the state bird of Louisiana. Photo © Terry Lunn |
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