Biology:Egret
| Egret | |
|---|---|
| |
| Eastern great egret (Ardea alba modesta) | |
Scientific classification
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Pelecaniformes |
| Family: | Ardeidae |
| Subfamily: | Ardeinae |
| Groups included | |
| Cladistically included but traditionally excluded taxa | |
|
Nycticorax | |
Egrets (/ˈiːɡrəts/ EE-grəts) are herons, generally long-legged wading birds, that have white or buff plumage, developing fine plumes (usually milky white) during the breeding season. Egrets are not a biologically distinct group from herons and have the same build.
Biology
Many egrets are members of the genera Egretta or Ardea, which also contain other species named as herons rather than egrets. The distinction between a heron and an egret is rather vague, and depends more on appearance than biology. The word "egret" comes from the French word aigrette that means both "silver heron" and "brush", referring to the long, filamentous feathers that seem to cascade down an egret's back during the breeding season (also called "egrets").
Several of the egrets have been reclassified from one genus to another in recent years; the great egret, for example, has been classified as a member of either Casmerodius, Egretta, or Ardea.
In the 19th and early part of the 20th centuries, some of the world's egret species were endangered by relentless plume hunting, since hat makers in Europe and the United States demanded large numbers of egret plumes, leading to breeding birds being killed in many places around the world.[1]
Several Egretta species, including the eastern reef egret, the reddish egret, and the western reef egret, have two distinct colours, one of which is just white. The little blue heron has all-white juvenile plumage.
Species in taxonomic order
- Great egret or great white egret, Ardea alba
- Great blue heron, Ardea herodias
- Intermediate egret, Mesophoyx intermedia
- Cattle egret, Bubulcus ibis
- Little egret Egretta garzetta
- Snowy egret, Egretta thula
- Reddish egret, Egretta rufescens
- Slaty egret, Egretta vinaceigula
- Black egret, Egretta ardesiaca
- Chinese egret, Egretta eulophotes
- Eastern reef egret or Pacific reef heron, Egretta sacra
- Western reef egret or Western reef heron, Egretta gularis
Habitat
Egrets inhabit all continents; although they typically avoid the coldest regions, arid deserts, and very high mountains. They hunt and live in both saltwater and freshwater marshes.[2]
References
- ↑ "Great Egret". 13 November 2014. https://www.audubon.org/field-guide/bird/great-egret.
- ↑ The Cornell Lab of Ornithology. "Egret". Cornell University. http://www.allaboutbirds.org/guide/Great_Egret/id.
External links
- Well written and illustrated Egret article Encyclopaedia Britannica
- Great egret Ardea alba—USGS+24r5
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