Great Black-backed Gull

Great Black-backed Gull

Larus marinus

Silhouette: Andy Wilson · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~20% · Possible
at Thingvellir National Park
75 Verified sightings at Thingvellir National Park From 2019 to 2026
19,790 Verified sightings across all 12 parks From 2019 to 2026
July Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Great Black-backed Gull

The great black-backed gull (Larus marinus) is the largest member of the gull and tern family Laridae. It is a very aggressive hunter, pirate and scavenger which breeds on the North Atlantic coasts and islands of northern Europe and northeastern North America. Southern populations are generally sedentary, while those breeding in the far north (northern Norway, northwest Russia) migrate farther south in winter. A few also move inland to large lakes and reservoirs. The adult has a white head, neck and underparts, dark blackish-grey wings and back, pink legs and the bill yellow with a red spot.

The great black-backed gull was one of the many species originally described by Carl Linnaeus in his 1758 10th edition of Systema Naturae, and it still bears its original scientific name of Larus marinus. Larus appears to have referred to a gull or other large seabird. The specific name marinus means "marine", or when taken together, "sea gull". The name predates Linnean taxonomy, as it had been called Larus ingens marinus by Carolus Clusius.

The terms swaabie (from Norn: swartbak, lit. 'black back'), baagie and baigie (Norn: bagi, from Old Norse: bak, lit. 'back') are local names... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Cape Breton Highlands National Park 🇨🇦 Canada
~50%
2 Gros Morne National Park 🇨🇦 Canada
~50%
3 Vatnajokull National Park 🇮🇸 Iceland
~40%
4 Acadia National Park 🇺🇸 United States
~40%
5 Wadden Sea National Park 🇩🇪 Germany
~30%
6 Snowdonia National Park 🇬🇧 United Kingdom
~30%
7 Point Pelee National Park 🇨🇦 Canada
~20%
8 Thingvellir National Park 🇮🇸 Iceland
~20%
9 Cairngorms National Park 🇬🇧 United Kingdom
<5%
10 Everglades National Park 🇺🇸 United States
<5%
11 Doñana National Park 🇪🇸 Spain
<5%
12 Fertő-Hanság National Park 🇭🇺 Hungary
Insufficient data

Quick answers

What are the chances of seeing a Great Black-backed Gull in Thingvellir National Park?

About 20% of wildlife watchers report a Great Black-backed Gull sighting in Thingvellir National Park, based on 75 verified sightings from GBIF citizen-science data.

When is the best time to see Great Black-backed Gull in Thingvellir National Park?

July has the highest sighting rate for Great Black-backed Gull in Thingvellir National Park in our monthly data.

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