Little Egret
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| Egretta garzetta Linnaeus, 1766 |
The Little Egret, Egretta garzetta is a small white heron. It is the Old World counterpart to the very similar New World Snowy Egret.
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[edit] Subspecies
There are at least two subspecies of Little Egret. The nominate subspecies E. g. garzetta occurs in Europe, Africa and Asia. E. g. nigripes breeds in Indonesia and Australasia. Those in Australia are sometimes thought to represent a third subspecies E. g. immaculata.
Several other egrets have often been classified as subspecies of the Little Egret but may form up to three separate species, their taxonomy is still uncertain. The Western Reef-Egret, Egretta (garzetta) gularis occurs on the coastline of West Africa. The Arabian Reef-Egret, Egretta (garzetta/gularis) schistacea breeds from the Red Sea to India. The Dimorphic Egret, Egretta (garzetta/gularis) dimorpha is found in East Africa, Madagascar, the Comoros and the Aldabra Islands.
[edit] Description
The adult Little Egret is 55-65 cm long with an 88-106 cm wingspan. It weighs 350-550 grams. Its plumage is all white. It has long black legs with yellow feet and a slim black bill. There is a bare patch of grey-green skin between the bill and eyes. In the breeding season, the adult has two long nape plumes and gauzy plumes on the back and breast. The bare skin between the bill and eyes becomes red or blue. Juveniles are similar to non-breeding adults but have duller legs and feet. The subspecies nigripes differs from garzetta in having yellow skin between the bill and eye and blackish feet.
Little Egrets are mostly silent but make various croaking and bubbling calls at their breeding colonies and produce a harsh alarm call when disturbed.
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[edit] Distribution and habitat
Its original breeding distribution was large inland wetlands and coastal wetlands in warm temperate parts of Europe, Asia, Africa and Australia.
In warmer locations, most birds are permanent residents; northern populations, including many European birds, migrate to Africa and southern Asia. They may also wander north after the breeding season, which presumably has led to this egret's range expansion.
[edit] Colonization of the New World
The Little Egret has now started to colonize the New World. The first record there was on Barbados in April 1954. It began breeding on the island in 1994. Birds are seen with increasing regularity and have occurred from Surinam and Brazil in the south to Newfoundland and Quebec in the north. Birds on the east coast of North America are thought to have moved north with Snowy Egrets from the Caribbean.
[edit] Northward spread in Europe
Until the 1950s, the Little Egret was restricted to southern Europe. Over the next few decades it became increasingly common in western France and later on the north coast. It bred in the Netherlands in 1979 with further breeding in the 1990s.
In Great Britain it was rare until the late twentieth century and almost certainly did not breed. In contrast, it has for just over a decade now become a regular breeding species and is commonly sighted, often in large numbers at favoured coastal sites. The first breeding record was at Brownsea Island in Dorset in 1996. There are now several colonies across southern England and the species bred in Wales for the first time in 2002.
In Ireland the species bred for the first time in 1997 at a site in County Cork.
[edit] Reproduction
The Little Egret nests in colonies, often with other wading birds, usually on platforms of sticks in trees or shrubs or in a reedbed or bamboo grove. In some locations such as the Cape Verde Islands, the species nests on cliffs. Pairs defend a small breeding territory, usually extending around 3-4 m from the nest. The three to five eggs are incubated by both adults for 21-25 days to hatching. They are oval in shape and a have a pale, non-glossy, blue-green colour. The young birds are covered in white down feathers, are cared for by both parents and fledge after 40 to 45 days.
[edit] Feeding
This egret stalks its prey in shallow water, often running with raised wings or shuffling its feet. It may also stand still and wait to ambush prey. It eats a variety of small animals including fish, amphibians, crustaceans, and insects.
[edit] Conservation
At one time, the plumes of the Little Egret and other egrets were in demand for decorating hats. They had been used for this purpose since at least the 17th century but in the 19th century it became a major craze and the number of egret skins passing through dealers reached into the millions. Egret farms were set up where the birds could be plucked without being killed but most of the supply was obtained by hunting which reduced the population of the species to dangerously low levels (stimulating the establishment of Britain's Royal Society for the Protection of Birds in 1889). Now conservation laws protect this species, and the population has rebounded strongly.
[edit] References
- BirdLife International (2004). Egretta garzetta. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006. Database entry includes justification for why this species is of least concern
- Mark Cocker & Richard Mabey (2005) Birds Britannica, Chatto & Windus, London
- D. W. Snow & C. M. Perrins (1998) Birds of the Western Palearctic: Concise Edition, Vol. 1, Oxford University Press
[edit] External links
Categories: Least Concern species | Egretta | Birds of Australia | Birds of Europe | Birds of Asia | Birds of Africa | Birds of India | Birds of Sri Lanka | Birds of China | Birds of Korea | Birds of Japan | Birds of Pakistan | Birds of Southeast Asia | Birds of Bangladesh | Birds of Myanmar | Birds of Vietnam | Birds of Cambodia | Birds of Thailand | Birds of Malaysia | Birds of Singapore | Birds of Brunei | Birds of Indonesia | Birds of the Philippines | Birds of Western Australia
