Bonaparte's Gull
Chroicocephalus philadelphia
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderCharadriiformes (Caradriformes)
- FamilyLaridae (Gulls, Terns, and Skimmers)
- GenusChroicocephalus (Masked Gulls and allies)
- SpeciesChroicocephalus philadelphia (Bonaparte's Gull)
Closest Relatives at Rocky Mountain National Park
Ring-billed Gull
Larus delawarensis
California Gull
Larus californicus
Larus pipixcan
Leucophaeus pipixcan
American Herring Gull
Larus smithsonianus
Lesser Black-backed Gull
Larus fuscus
Iceland Gull
Larus glaucoides
Sabine's Gull
Xema sabini
Forster's Tern
Sterna forsteri
Caspian Tern
Hydroprogne caspia
Black Tern
Chlidonias niger
Spotted Sandpiper
Actitis macularius
Wilson's Snipe
Gallinago delicata
📅 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 Bonaparte's Gull in Rocky Mountain National Park?
About 0% of visitor-days record a Bonaparte's Gull sighting in Rocky Mountain National Park, based on 7 observer-days of citizen-science data from GBIF.
When is the best time to see Bonaparte's Gull in Rocky Mountain National Park?
May has the highest sighting rate for Bonaparte's Gull in Rocky Mountain National Park in our monthly data.