Western Gull
Larus occidentalis
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusLarus (Large White-headed Gulls)
- SpeciesLarus occidentalis (Western Gull)
Closest Relatives at El Vizcaíno Biosphere Reserve
Ring-billed Gull
Larus delawarensis
California Gull
Larus californicus
American Herring Gull
Larus smithsonianus
Heermann's Gull
Larus heermanni
Lesser Black-backed Gull
Larus fuscus
Yellow-footed Gull
Larus livens
Glaucous-winged Gull
Larus glaucescens
Iceland Gull
Larus glaucoides
Glaucous Gull
Larus hyperboreus
Caspian Tern
Hydroprogne caspia
Royal Tern
Thalasseus maximus
Forster's Tern
Sterna forsteri
📅 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
| # | Park | Country | Probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States | |
| 2 | El Vizcaíno Biosphere Reserve | 🇲🇽 Mexico | |
| 3 | Redwood National Park | 🇺🇸 United States | |
| 4 | Olympic National Park | 🇺🇸 United States | |
| 5 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 6 | Great Bear Rainforest | 🇨🇦 Canada | |
| 7 | Joshua Tree National Park | 🇺🇸 United States | |
| 8 | Bahía de Loreto National Park | 🇲🇽 Mexico |
Quick answers
What are the chances of seeing a Western Gull in El Vizcaíno Biosphere Reserve?
About 66% of visitor-days record a Western Gull sighting in El Vizcaíno Biosphere Reserve, based on 557 observer-days of citizen-science data from GBIF.
When is the best time to see Western Gull in El Vizcaíno Biosphere Reserve?
May has the highest sighting rate for Western Gull in El Vizcaíno Biosphere Reserve in our monthly data.