Notes: Long, curved bill. Adults mostly dark with iridescent
green and reddish tones. Very thin white border surrounding the dark facial
skin. Bare skin forward of eye cobalt-blue during court- ship, otherwise
blackish. Dark eyes. Non-breeding head & neck heavily streaked sooty brown
& white; looks less glossy. Juvenile: dull, some whitish streaks & mottling on head & neck, short bill.
Feeds in shallow fresh water, s.times in estuarine waters, dry grassland.