Black-headed Gull
Chroicocephalus ridibundus
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusChroicocephalus (Masked Gulls and allies)
- SpeciesChroicocephalus ridibundus (Black-headed Gull)
Closest Relatives at Thingvellir National Park
Arctic Tern
Sterna paradisaea
Lesser Black-backed Gull
Larus fuscus
Great Black-backed Gull
Larus marinus
European Herring Gull
Larus argentatus
Common Gull
Larus canus
Glaucous Gull
Larus hyperboreus
Iceland Gull
Larus glaucoides
Black-legged Kittiwake
Rissa tridactyla
Little Gull
Hydrocoloeus minutus
Common Snipe
Gallinago gallinago
Whimbrel
Numenius phaeopus
European Golden Plover
Pluvialis apricaria
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
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
Quick answers
What are the chances of seeing a Black-headed Gull in Thingvellir National Park?
About 90% of visitor-days record a Black-headed Gull sighting in Thingvellir National Park, based on 213 observer-days of citizen-science data from GBIF.
When is the best time to see Black-headed Gull in Thingvellir National Park?
June has the highest sighting rate for Black-headed Gull in Thingvellir National Park in our monthly data.