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)
The ring-billed gull (Larus delawarensis) is a medium-sized gull native to North America, breeding in Canada and the northern Contiguous United States, and wintering mainly in the United States and northern Mexico. The genus name is from Latin Larus which appears to have referred to a gull or other large seabird. The specific delawarensis refers to the Delaware River. Wikipedia →
Closest Relatives at Tortuguero National Park
Lesser Black-backed Gull
Larus fuscus
American Herring Gull
Larus smithsonianus
Royal Tern
Thalasseus maximus
Laughing Gull
Leucophaeus atricilla
Franklin's Gull
Leucophaeus pipixcan
Sandwich Tern
Thalasseus sandvicensis
Brown Noddy
Anous stolidus
Black Skimmer
Rynchops niger
Black Tern
Chlidonias niger
Common Tern
Sterna hirundo
Gull-billed Tern
Gelochelidon nilotica
Caspian Tern
Hydroprogne caspia
📅 Monthly Probability
Fewer than 5 records of Ring-billed Gull at Tortuguero National Park — not enough to chart months honestly.
☀️ 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