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The common shelduck (Tadorna tadorna) is a waterfowl species of the shelduck genus, Tadorna. It is widespread and common in the Euro-Siberian region of the Palearctic , mainly breeding in temperate and wintering in subtropical regions; in winter, it can also be found in the Maghreb .
[4] [5] The type species is the common shelduck. [5] The genus name comes from the French name Tadorne for the common shelduck. [6] It may originally derive from Celtic roots meaning "pied waterfowl", essentially the same as the English "shelduck". [7] A group of them is called a "dopping," taken from the Harley Manuscript. [8]
The following other wikis use this file: Usage on de.wiktionary.org Brandgans; Usage on fy.wikipedia.org Berchein; Bercheinen; Usage on lt.wikipedia.org
Radjah shelduck: Radjah radjah (Garnot & Lesson, RP, 1828) 55 Common shelduck: Tadorna tadorna (Linnaeus, 1758) 56 Ruddy shelduck: Tadorna ferruginea (Pallas, 1764) 57 South African shelduck: Tadorna cana (Gmelin, JF, 1789) 58 Australian shelduck: Tadorna tadornoides (Jardine & Selby, 1828) 59 Paradise shelduck: Tadorna variegata (Gmelin, JF ...
Common shelduck; Crested shelduck; P. Paradise shelduck; R. Ruddy shelduck; S. South African shelduck This page was last edited on 14 March 2013, at 03:36 (UTC). ...
They are large, black-and-white or completely black, with long wings and deeply forked tails. The males have coloured inflatable throat pouches. They do not swim or walk and cannot take off from a flat surface. Having the largest wingspan-to-body-weight ratio of any bird, they are essentially aerial, able to stay aloft for more than a week. [25]
The root box is estimated from a measurement of the wing width at the base (the root chord) and the difference between the wingspan and two times the extent of a single wing. [10] Alternatively, the total wing area can be estimated using the wingspan, wing length, and wing width and assuming simple geometric figures for the shape of the wings. [11]
Ruddy shelduck, Tadorna ferruginea (A) Common shelduck, Tadorna tadorna; Crested shelduck, ... Having the largest wingspan-to-body-weight ratio of any bird, they are ...