Friday, April 18, 2014

fantastic pics of american white pelican ducks

The American White Pelican rivals the Trumpeter Swan as the longest bird native to North America. Both very large and plump, it has an overall length is about 50–70 in (130–180 cm), courtesy of the huge beak which measures 11.3–15.2 in (290–390 mm) in males and 10.3–14.2 in (260–360 mm) in females. It has a wingspan of about 95–120 in (240–300 cm). The species also has the second largest average wingspan of any North American bird, after the California Condor. Body weight can range between 9.2 and 30 lb (4.2 and 13.6 kg),although typically these birds average between 11 and 20 lb (5.0 and 9.1 kg). Among standard measurements, the wing chord measures 20–26.7 in (51–68 cm) and the tarsus measures 3.9–5.4 in (9.9–13.7 cm) long.The bill is huge and flat on the top, with a large throat sac below, and, in the breeding season, is vivid orange in color as is the iris, the bare skin around the eye, and the feet.

American White Pelicans like to come together in groups of a dozen or more birds to feed, as they can thus cooperate and corral fish to one another. When this is not easily possible – for example in deep water, where fish can escape by diving out of reach –, they prefer to forage alone. But the birds also steal food on occasion from other birds, White pelicans are known to steal fish from other pelicans, gulls and cormorants from the surface of the water and, in one case, from a Great Blue Heron while both large birds were in flight.The birds arrive on the breeding grounds in March or April; nesting starts between early April and early June. The nest is a shallow depression scraped in the ground, in some twigs, sticks, reeds or similar debris have been gathered. After about one week of courtship and nest-building, the female lays a clutch of usually 2 or 3 eggs, sometimes just 1, sometimes up to 6.Both parents incubate for about 4 weeks to one month and the young leave the nest 3–4 weeks after hatching; at this point, usually only one young per nest has survived.for more images...

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