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CoastalPlatform nestLarge · 842 g
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.
When to see the Olrog's Gull
One bar for each month. Filled bars are the 10 months with records; pale bars are months with none. The wide bar is July, the month with the most records.
Where to see the Olrog's Gull
The map shades 3 countries with regular records. Everything unshaded has no records. Countries are listed below the map.
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.
Easily confused with
Mongolian GullLarus mongolicusMongolian gull is closely similar to its relatives Caspian gull and Vega gull, and also to the European herring gull (Larus argentatus), with identification needing careful examination of the wing pattern and moult, and in young birds, the wing and tail patterns.
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.
Side by side: Olrog's Gull vs Vega Gull · Olrog's Gull vs Yellow-footed Gull
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