to marshes and lakes with plenty of vegetation to conceal
These birds feed mainly by diving, but they will dabble.
They eat molluscs, aquatic insects and some plants and sometimes
feed at night
Male generally silent.
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.