About the Olrog's Gull
Olrog's gull is a species of gull found along the Atlantic coast of southern Brazil, Uruguay, and northern Argentina. It was formerly considered a subspecies of the very similar L. belcheri. It is a large gull with a black back and wings, white head and underparts, a black band in the otherwise white tail, and a yellow bill with a red and black tip. Nonbreeding adults have a blackish head and a white eye ring. The species is named after Swedish-Argentine biologist Claes C. Olrog. It has a rather restricted breeding range and is threatened by habitat loss, and the IUCN has rated it as being "near threatened".
Text adapted from Wikipedia, licensed CC BY-SA 4.0.
ID tip
Olrog's gull is a large gull with a white head, neck, rump, breast, and belly. The back and wings are black except for a white trailing edge to the wings. The tail is white with a broad black band at the back. The beak is yellow with a black band and red tip. The eyes are brown with a red orbital ring and the legs and feet are dull yellow. The length of this gull is 50 to 60 cm (20 to 24 in) and it has a wingspan of 130 to 140 cm (51 to 55 in). Males are a little larger than females. Juveniles have black heads and brownish plumage.
Text from Wikipedia, licensed CC BY-SA 4.0.
Where the Olrog's Gull lives
When to see the Olrog's Gull
Peak activity in July · a variable species across most of its range
Easily confused with
Vega GullLarus vegaeThe Vega gull is similar to the herring gull but is slightly darker grey above.
Yellow-footed GullLarus livensAdults are similar in appearance to the western gull with a white head, dark, slate-colored back and wings, and a thick yellow bill.
Slaty-backed GullLarus schistisagusIt is tied with the yellow-footed gull for fourth-largest gull species, measuring 55–68.5 cm (21.7–27.0 in) in length, 132–160 cm (52–63 in) in wingspan, and 1.05–1.7 kg (2.3–3.7 lb) in weight.
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