Widely distributed resident of Galapagos. The total world population occurs on the Galapagos Islands only and is fewer than 400 pairs. Breeds throughout the year, but mainly from May to October, nesting singly in the shore zone.
Unmistakable; the only all-dark gull, with heavy bill. ADULT: Blackish head with white eyelids, sooty-grey upper parts and breast, paler on belly. In flight, darker primaries contrast with rest of wing; rump and outer rail feathers whitish. JUVENILE: Dark chocolate-brown overall, except for pale rump. FIRST-WINTER / FlRST-SUMMER: Similar to juvenile, but has greyer tints to head and upperparts.
A tideline scavenger, rarely alighting on the sea.