Ring-billed Gull
Larus delawarensis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusLarus (Large White-headed Gulls)
- SpeciesLarus delawarensis (Ring-billed Gull)
Closest Relatives at Ría Lagartos Biosphere Reserve
American Herring Gull
Larus smithsonianus
Lesser Black-backed Gull
Larus fuscus
Dominican Gull
Larus dominicanus
Laughing Gull
Leucophaeus atricilla
Royal Tern
Thalasseus maximus
Sandwich Tern
Thalasseus sandvicensis
Black Skimmer
Rynchops niger
Gull-billed Tern
Gelochelidon nilotica
Caspian Tern
Hydroprogne caspia
Forster's Tern
Sterna forsteri
Least Tern
Sternula antillarum
Cabot's Tern
Thalasseus acuflavidus
📅 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 Ring-billed Gull in Ría Lagartos Biosphere Reserve?
About 9% of visitor-days record a Ring-billed Gull sighting in Ría Lagartos Biosphere Reserve, based on 88 observer-days of citizen-science data from GBIF.
When is the best time to see Ring-billed Gull in Ría Lagartos Biosphere Reserve?
December has the highest sighting rate for Ring-billed Gull in Ría Lagartos Biosphere Reserve in our monthly data.