Common Shelduck

Scientific Name
Tadorna tadorna
Order
Family
Genus
Conservation Status
Least Concern (LC)
Sub-Family
Tadorninae

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Wikipedia Article

The Common Shelduck (Tadorna tadorna) is a waterfowl species shelduck genus Tadorna. It is widespread and common in Eurasia, mainly breeding in temperate and wintering in subtropical regions; in winter, it can also be found in the Maghreb. Its scientific name comes from Celtic roots and means "pied waterfowl", essentially the same as the English "shelduck". Fossil bones from Dorkovo (Bulgaria) described as Balcanas pliocaenica may actually belong to this species. More likely, they are an extinct species of Tadorna (if not a distinct genus) due to their Early Pliocene age; the present species is not unequivocally attested from the fossil record until some 2-3 million years later (Late Pliocene/Early Pleistocene).
The Common Shelduck resembles a small short-necked goose in size and shape. It is a striking bird, with a reddish-pink bill, pink feet, a white body with chestnut patches and a black belly, and a dark green head and neck. The wing coverts are white, the primary remiges black, and the secondaries green (only showing in flight) and chestnut. The underwings are almost entirely white. Sexes are similar, but the female is smaller, with some white facial markings, while the male is particularly crisply colored in the breeding season, his bill bright red and bearing a prominent knob at the forehead. Ducklings are white, with black cap, hindneck and wing and back patches. Juveniles are similarly colored, greyish above and mostly white below, but already have the adult's wing pattern. The call is a loud honk.
This is a bird which breeds in temperate Eurasia. Most populations migrate to subtropical areas in winter, but this species is largely resident in westernmost Europe, apart from movements to favoured moulting grounds, such as the Wadden Sea on the north German coast. The Common Shelduck is common around the coastline of Great Britain (where it is simply known as Shelduck), where it frequents salt marshes and estuaries. Sightings of this bird are rare in North America and are reported as infrequent visitors to the U.S. and Canada.
Moulting flocks can be very large (100,000 on the Wadden Sea), since most pairs leave their partially grown young in a crche with just one or two adults. This species is mainly associated with lakes and rivers in open country, breeding in rabbit burrows, tree holes, haystacks or similar. In winter it is common on suitable estuaries and tidal mudflats as well. This bird is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies. The young will dive under water to avoid predators and the adults will fly away from them to act as a decoy. Brandgans grndelnd.JPG|Adults upending, note underside and feet colors Shelduck mating.jpg|Adults mating in Lancashire (UK) (male right), note size difference Diorama Brandgnse.JPG|Nesting site diorama, Kstenmuseum Juist (Germany) Brandgans Kken, Borkum.JPG|Ducklings on Borkum (Germany)