The adult male is all black except for white flanks and a blue-grey bill. It has an obvious head tuft that gives the species its name. The adult female is brown with paler flanks, and is more easily confused with other diving ducks. In particular, some have white around the bill base which resembles the scaup species, although the white is never as extensive as in those ducks.
Their breeding habitat is close to marshes and lakes with plenty of vegetation to conceal the nest. They are also found on coastal lagoons, the seashore, and sheltered ponds of Eurasia US and Canada. They are migratory mainly to milder Europe and Southern part of Asia .For Malaysia it is a vagrant and if it land in Malaysia you take the earliest opportunity to make acquintance if not you have to wait another umpteen years. I must say 2013 sure is a good year for the local birding fraternity..................
These birds feed mainly by diving, but they will dabble. They eat molluscs, aquatic insects and some plants and sometimes feed at night.
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