Larus serranus (Tschudi)
Length: 44 – 45 cms.
Summer plumage: black head; white semi circles around eyes. White neck. Back and coverts grey. Breast, abdomen and undertail coverts, crissum and tail white. Breast with pink tint. Black primaries with white external spurs. Beak and feet dark red. Winter plumage: white head with some dark mottling behind the eyes. Legs darker.