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Jul 17, 2011 Features / Columnists, Interesting Creatures in Guyana
The Great Egret (Ardea alba), also known as the Great White Egret or Common Egret or White Heron, is a large, widely-distributed egret. Found across most of the tropical and warmer temperate regions of the world, in southern Europe it is rather localized. In North America it is more widely distributed, and it is ubiquitous across the Sun Belt of the United States and in the rainforests of South America.
The Great Egret is a large bird with all-white plumage that can reach one metre in height, weigh up to 950 grams (2.1 lb) and has a wingspan of 165 to 215 cm (65 to 85 in). It is thus only slightly smaller than the Great Blue or Grey Heron.
Apart from size, the Great Egret can be distinguished from other white egrets by its yellow bill and black legs and feet, though the bill may become darker and the lower legs lighter in the breeding season. In breeding plumage, delicate ornamental feathers are borne on the back. Males and females are identical in appearance; juveniles look like non-breeding adults. It is a common species, usually easily seen.
It has a slow flight, with its neck retracted. This is characteristic of herons and bitterns, and distinguishes them from storks, cranes, ibises, and spoonbills, which extend their necks in flight.
The Great Egret is not normally a vocal bird; at breeding colonies, however, it often gives a loud croaking cuk cuk cuk.
Ecology and status
The Great Egret is partially migratory, with northern hemisphere birds moving south from areas with colder winters. It breeds in colonies in trees close to large lakes with reed beds or other extensive wetlands. It builds a bulky stick nest.
It is generally a very successful species with a large and expanding range. In North America, large numbers of Great Egrets were killed around the end of the 19th century so that their plumes could be used to decorate hats. Numbers have since recovered as a result of conservation measures.
Its range has expanded as far north as southern Canada. However, in some parts of the southern United States, its numbers have declined due to habitat loss. Nevertheless, it adapts well to human habitation and can be readily seen near wetlands and bodies of water in urban and suburban areas.
The Great Egret feeds in shallow water or drier habitats, its diet consists mainly of fish, frogs, small mammals, and occasionally small reptiles and insects, spearing them with its long, sharp bill most of the time by standing still and allowing the prey to come within its striking distance. It will often wait motionless for prey, or slowly stalk its victim.
Though it might appear that they feed on the parasites of African buffaloes, they actually feed on leafhoppers, grasshoppers and other insects which are stirred open as buffaloes move about in water.
(Source: Wikipedia, the free encyclopedia)
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