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The Eurasian wigeon is a bird of open wetlands, such as wet grassland or marshes with some taller vegetation, and usually feeds by dabbling for plant food or grazing, which it does very readily. It nests on the ground, near water and under cover. It is highly gregarious outside of the breeding season and will form large flocks.
The American wigeon was formerly called the baldpate by ornithologists, and some people still use that name, especially hunters. The diet of the wigeon consists mainly of grass leaves (~80%), other food types eaten are seeds (~10%) and roots and stems (~5%).
The gadwall was first described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae. [3] DNA studies have shown that it is a sister species with the falcated duck; the two are closely related to the three species of wigeons, and all of them have been assigned to the genus Mareca.
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This article follows a common definition of Europe as being bounded to the south by the Mediterranean Sea, to the east and north-east by the Ural Mountains, the Ural River, and the Caspian Sea, and to the south-east by the Caucasus Mountains, the Black Sea, and the waterways connecting the Black Sea to the Mediterranean Sea.
The area includes Russia east of the Ural River and Ural Mountains and the Russian Arctic islands east of Novaya Zemlya, as well as Kazakhstan, Georgia, Azerbaijan, and Turkey. The area is separated from Africa by the Suez Canal. In the Indian Ocean it includes Sri Lanka, Lakshadweep (the Laccadive Islands), the Andaman and Nicobar Islands.
The Gran Canaria blue chaffinch is endemic to the Canary Islands. This is a list of the bird species recorded in the Canary Islands. The avifauna of the Canary Islands include a total of 394 species, of which seven are endemic, and nine have been introduced by humans. One listed species is extinct.
[citation needed] Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species , [ 54 ] making it the second-largest grouping of deuterostomes (a superphylum), after the chordates (which include the vertebrates , such as birds , fishes , mammals , and reptiles ).