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Tuesday, 23 July 2019

Eurasian coot

The Eurasian coot (Fulica atra), also known as the common coot, is a member of the rail and crake bird family, the Rallidae. It is found in Europe, Asia, Australia and parts of Africa. The scientific name is from Latin; Fulica is "coot", and atra is "black". There are two subspecies, only one of which is extant: the Australian coot (F. atra australis) which can be found in Australia, New Guinea and New Zealand; and F. atra pontica, which has been described from the Chalcolithic (around 4800-4400 BP) from the Bulgarian Black Sea Coast. The Eurasian coot is 32–42 cm (13–17 in) long and weighs 585–1,100 g (1.290–2.425 lb), and is largely black except for the white frontal shield (which gave rise to the phrase "as bald as a coot", in use as early as 1430). As a swimming species, the coot has partial webbing on its long strong toes.The juvenile is paler than the adult, has a whitish breast, and lacks the facial shield; the adult black plumage develops when about 3–4 months old, but the white shield is only fully developed at about one year old.
This is a noisy bird with a wide repertoire of crackling, explosive, or trumpeting calls, often given at night.
The coot breeds across much of the Old World on freshwater lakes and ponds. It occurs and breeds in Europe, Asia, Australia, and Africa. The species has recently expanded its range into New Zealand. It is resident in the milder parts of its range, but migrates further south and west from much of Asia in winter as the waters freeze. This species builds a nest of dead reeds or grasses, but also pieces of paper or plastic near the water's edge or on underwater obstacles protruding from the water, laying up to 10 eggs, sometimes 2 or 3 times per season. Usually only a few young survive. They are frequent preyfor birds such as herons and gulls. The coot is an omnivore, and will take a variety of small live prey including the eggs of other water birds, as well as algae, vegetation, seeds and fruit. It shows considerable variation in its feeding techniques, grazing on land or in the water. In the water it may upend in the fashion of a mallard or dive in search of food.

(latin: Fulica atra)

Tuesday, 23 July 2019
created by: Marek Sarvas - výroba stránok