White-tufted Grebe Rollandia rolland

Widespread and often fairly common small dark grebe of lakes, ponds, wetlands; also river mouths and coastal waters, mainly in winter. Like all grebes dives well and can stay underwater for a long time. No similar species in range. Handsome breeding birds have a bold white “fan” on the sides of the head. Immature and nonbreeding birds have a dark cap and a streaked whitish face. Falkland population is larger and blacker, and is likely a different species.