Another abundant duck in the northern hemisphere, recently
taxonomic changes have resulted in a new genus Mareca, containing Wigeon, Gadwall and Falcated Duck.
Not universally agreed upon, but a useful treatment with regard to the formerly "catch-all" genus of Anas.
Gadwall uses vegetated water bodies as do many ducks, and is primarily a dabbling duck. After breeding forms flocks
on lakes and estuaries but usually away from coasts. Northern populations migrate south but rarely reach the equator
, birds from more temperate zones are resident.
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