Birds
File:Larus schistisagus, Rebun Island, Hokkaido.jpg

Slaty-backed Gull

Slaty-backed Gull

95
2 weeks ago
Spotted
The Slaty-backed Gull is a large gull characterized by its dark, slate-grey back and upperwings. It is native to Northeast Asia and is a powerful flier, often seen offshore or along rocky coastlines. This species is known for its hardy nature in harsh northern climates.
Where to spot
Breeds along the coasts and islands of northeastern Asia, including Siberia, Kamchatka, Sakhalin, and the Kuril Islands. Winters south to Japan, Korea, and coastal China. Vagrants sometimes reach Alaska and North America.
How to spot
Look for its very dark slate-grey back and upperwings, contrasting white head and underparts, and pale yellow legs. Distinguish from similar large gulls by the extent of dark plumage and leg color. Observe its powerful, steady flight over water.
When to spot
Best seen during the breeding season (May-July) in its northern range, or during migration and winter (September-March) along the coasts of East Asia. Pelagic trips can offer views of individuals offshore.
File:Larus schistisagus, Rebun Island, Hokkaido.jpg
File:Larus schistisagus, Sakhalin (210203443).jpg
File:Larus schistisagus-USFWS.jpg
File:Larus schistisagus pair, Niikappu, Hokkaido, Japan.jpg
File:Larus schistisagus pair, Niikappu, Hokkaido, Japan (crop).jpg
File:Larus schistisagus winter.jpg
File:Slaty-backed gull (Larus schistisagus) 2023.jpg
File:Slaty-bcked Gull (Larus schistisagus) (31842346224).jpg
File:Larus schistisagus, Rebun Island, Hokkaido.jpg
Credits: Wikimedia Commons
File:Larus schistisagus, Sakhalin (210203443).jpg
Credits: Wikimedia Commons
File:Larus schistisagus-USFWS.jpg
Credits: Wikimedia Commons
File:Larus schistisagus pair, Niikappu, Hokkaido, Japan.jpg
Credits: Wikimedia Commons
File:Larus schistisagus pair, Niikappu, Hokkaido, Japan (crop).jpg
Credits: Wikimedia Commons
File:Larus schistisagus winter.jpg
Credits: Wikimedia Commons
File:Slaty-backed gull (Larus schistisagus) 2023.jpg
Credits: Wikimedia Commons
File:Slaty-bcked Gull (Larus schistisagus) (31842346224).jpg
Credits: Wikimedia Commons
This gull often nests on cliffs and rocky islets in remote northern regions, making its breeding colonies difficult to access and study.
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Spotted

Recently spotted
60 (Seen in the last 3 months)
Last spotted
2 weeks ago

Monthly observations

1 observation
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jenny van Dorland
jenny van Dorland
2 years ago
Slaty-backed Gull
Rotterdam, Zuid-Holland
Spotted Slaty-backed Gull
Spotted Slaty-backed Gull
+110
Lifer
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