Great Black-backed Gull
Great Black-backed GullGreat Black-backed GullGreat Black-backed GullGreat Black-backed Gull

Great Black-backed Gull

Larus marinus

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Insufficient data
overall probability at Fertő-Hanság National Park
4 Verified records at Fertő-Hanság National Park
☀️ Diurnal When it's active during daytime hours (6am–6pm)

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. Wikipedia →

Closest Relatives at Fertő-Hanság National Park

Yellow-legged Gull
LC Endemic

Yellow-legged Gull

☀️ Diurnal Bird

Larus michahellis

40–50% · Likely
Caspian Gull
LC

Caspian Gull

☀️ Diurnal Bird

Larus cachinnans

10–20% · With luck
Common Gull
LC

Common Gull

☀️ Diurnal Bird

Larus canus

10–20% · With luck
Lesser Black-backed Gull
LC

Lesser Black-backed Gull

☀️ Diurnal Bird

Larus fuscus

<5% · Rare
European Herring Gull
LC

European Herring Gull

🌅 Crepuscular Bird

Larus argentatus

Insufficient data
Black-headed Gull

Black-headed Gull

☀️ Diurnal Bird

Chroicocephalus ridibundus

70–80% · Very likely
Common Tern
LC

Common Tern

☀️ Diurnal Bird

Sterna hirundo

30–40% · Possible
Black Tern
LC

Black Tern

☀️ Diurnal Bird

Chlidonias niger

20–30% · Possible
Whiskered Tern
LC

Whiskered Tern

☀️ Diurnal Bird

Chlidonias hybrida

20–30% · Possible
Little Gull
LC

Little Gull

☀️ Diurnal Bird

Hydrocoloeus minutus

10–20% · With luck
Mediterranean Gull

Mediterranean Gull

Bird

Ichthyaetus melanocephalus

5–10% · With luck
White-winged Tern
LC

White-winged Tern

☀️ Diurnal Bird

Chlidonias leucopterus

5–10% · With luck

📅 Monthly Probability

📊

Fewer than 5 records of Great Black-backed Gull at Fertő-Hanság National Park — not enough to chart months honestly.

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Cape Breton Highlands National Park 🇨🇦 Canada
50–60%
2 Gros Morne National Park 🇨🇦 Canada
40–50%
3 Vatnajokull National Park 🇮🇸 Iceland
40–50%
4 Acadia National Park 🇺🇸 United States
40–50%
5 Wadden Sea National Park 🇩🇪 Germany
20–30%
6 Snowdonia National Park 🇬🇧 United Kingdom
20–30%
7 Point Pelee National Park 🇨🇦 Canada
20–30%
8 Thingvellir National Park 🇮🇸 Iceland
10–20%
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
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