Join for FREE
It only takes a minute!
Experience the Great Outdoors. New Zeiss Terra ED Binoculars. Visit our online shop to find out more!

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Personal tools
Main Categories

Great Egret

From Opus

Alternative names: Great White Egret, White Heron, Common Egret

Subspecies egretta, breedingPhoto by GeneIllinois, April 2004
Subspecies egretta, breeding
Photo by Gene
Illinois, April 2004
Ardea alba

Contents

[edit] Identification

Height 101cm
Weight 950g

  • Large white bird
  • Slightly smaller and with a much slimmer build than Great Blue Heron or Grey Heron
  • black legs/feet in American populations, but yellow in European birds of subspecies alba and greyish in non-breeding east Asian birds of subspecies modesta.
  • bill yellow in most stages
  • In short "high breeding" period bill becomes black (at least in Europe)
Subspecies albaPhoto by Duke LetoLesvos, Greece, May 2011
Subspecies alba
Photo by Duke Leto
Lesvos, Greece, May 2011
  • lores yellow in most birds, but America birds show green lores in high breeding
  • In breeding plumage shows ornamental plumes

[edit] Similar Species

Most of the year, distinguished from other egrets by combination of leg/foot and bill color.

[edit] Distribution

A very widespread bird occurring in North and South America, Europe, Africa, Asia and Australasia.

In North America breeds in the west in Oregon and California and over much of the east from southern Ontario and Long Island southwards. Breeds throughout Mexico, Central America and the West Indies and throughout South America except the higher mountains and Patagonia. Post-breeding dispersal takes birds far north and south of main breeding range and vagrants recorded in Newfoundland, on Tierra del Fuego and the Falkland Islands.

Subspecies modestaPhoto by tcollinsDarwin, Northern Territory Australia, May 2011
Subspecies modesta
Photo by tcollins
Darwin, Northern Territory Australia, May 2011

A local breeder in the Western Palearctic, after declining for many years has now begun to increase and spread. Breeds in Austria and Hungary, at Lake Skadar on the Montenegro-Albania border, the Danube Delta and at scattered sites in the Ukraine and across southern Russia to the Caspian. Breeding has also recently taken place in the Netherlands, Germany and Slovakia, Poland, Belarus, and Latvia. A rapid colonisation is also occurring in Lithuania, having first bred in 2005 and now taking place in three locations, autumn counts have also expanded to the extent that flocks of up to 300 now occur in prime localities (compared to just odd individuals in the early 1990s). In 1994 the first breeding for France occurred and small numbers now breed in northern Italy. A pair at the Ebro Delta in 1997 was the first breeding record for Spain.

In winter occurs on the north and east coasts of the Adriatic Sea, in southern Greece and western Turkey, in Tunisia, the Nile Delta and in southern Iraq. Increasingly recorded in the Camargue where more than 100 now occur in winter. A vagrant to all European countries, north to Britain, (c.200), Ireland and Norway and throughout the Mediterranean and on the Canaries. Vagrancy is increasing in most areas as population and range increases. Recently recorded for the first time in Iceland. Extremely rare on the Azores and presumably these records involve American race egretta which has also been recorded in the British Isles.

More widespread in Asia breeding from the Caspian Sea and Iran east to the Russian Far East, Korea and southern Japan and south to Malaysia, Indonesia and New Guinea. Northern birds vacate breeding areas in winter. Mainly coastal in Australia but can occur throughout the continent and now breeds on South Island, New Zealand.

Occurs almost throughout sub-Saharan Africa but actual breeding range is little-known. Has been recorded breeding in west, east and southern Africa.

[edit] Taxonomy

Various authors also identify this species as Egretta alba and Casmerodius albus. However, this species closely resembles the large Ardea herons such as Grey Heron and Great Blue Heron in everything but colour, whereas it shows fewer similarities to the smaller white egrets.

[edit] Subspecies

Mating dancePhoto by bobsofpaVenice Rookery, Florida, USA, February 2010
Mating dance
Photo by bobsofpa
Venice Rookery, Florida, USA, February 2010

Four subspecies are currently recognized in various parts of the world[1]:

  • A. a. alba: Eurasian
  • A. a. melanorhynchos: African
  • A. a. egretta: American
  • A. a. modesta: Australasian

The last subspecies is increasingly being proposed for full species status, Eastern Great Egret, Ardea modesta. If recognized, this form would replace alba from Pakistan, India and Bangladesh east to south-east China and north to the far east of Russia. It would be found from there to Australia and New Zealand. Birds of this form are quite a bit smaller than European alba and with greyish tibia in non-breeding plumage.

[edit] Habitat

Photo by 4NilesGilbert, Arizona, March 2011
Photo by 4Niles
Gilbert, Arizona, March 2011

Lakes and marshes, wet meadows and grassland, breeds in reedbeds or other dense vegetation. On passage and in winter also on mudflats, estuaries and brackish lagoons.

[edit] Behaviour

It is a conspicuous species, usually easily seen.

[edit] Vocalisation

Described as mostly silent outside of breeding colonies, but a number of sounds have been described. The most common sound is a low pitch croaking sound heard from birds scared into flight. Around the nest, the adults greet each others with a number of calls, some described as "Rha" or "Cra" and another described as laughing. Young beg with a "Ket" call, given as a repeated series. There might be regional differences in sounds given.


Listen in an external program
Recording by Alok Tewari
Keoladeo National Park, India, Dec-2016
Croaking call given in flight and on alighting.

[edit] Flight

Slow flight with retracted neck, characteristic of herons/bitterns (can occasionally be extended, but rarely for long); this distinguishes it from cranes and spoonbills (extended necks).

[edit] Diet

Feeds in shallow water or drier habitats, spearing fish, frogs or insects with its long, sharp bill. It will often wait motionless for prey, or slowly stalk its victim.

[edit] Breeding

Colonial nesters, often with other egret species, the stick nest is built in a shrub or tree. The clutch consists of up to 6 pale greenish-blue eggs.

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, with updates to August 2016. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Cornell Lab, All About Birds
  3. Birdforum thread discussing taxonomy of Great Egret including the possible split of modesta (especially second part of the thread).
  4. The Heron Conservation page on Great Egret
  5. Svensson, Mullarney, Zetterstrom (2009): Birds of Europe, second edition, Princeton Field Guides. ISBN 978-0-691-14392-7

[edit] External Links



Advertisement


Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.28328991 seconds with 6 queries
All times are GMT. The time now is 05:25.