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 →
5–10% of wildlife watchers report a Ring-billed Gull sighting in Ría Lagartos Biosphere Reserve, based on 88 days of visitor records from GBIF citizen-science data.
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 wildlife watchers report a Ring-billed Gull sighting in Ría Lagartos Biosphere Reserve, based on 88 days of visitor records from GBIF citizen-science data.
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.