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 Kenai Fjords National Park
Black-legged Kittiwake
Rissa tridactyla
Glaucous-winged Gull
Larus glaucescens
Short-billed Gull
Larus brachyrhynchus
American Herring Gull
Larus smithsonianus
Arctic Tern
Sterna paradisaea
Slaty-backed Gull
Larus schistisagus
Sabine's Gull
Xema sabini
Aleutian Tern
Onychoprion aleuticus
Caspian Tern
Hydroprogne caspia
Glaucous Gull
Larus hyperboreus
Iceland Gull
Larus glaucoides
Horned Puffin
Fratercula corniculata
📅 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 Kenai Fjords National Park?
About 6% of visitor-days record a Bonaparte's Gull sighting in Kenai Fjords National Park, based on 42 observer-days of citizen-science data from GBIF.
When is the best time to see Bonaparte's Gull in Kenai Fjords National Park?
August has the highest sighting rate for Bonaparte's Gull in Kenai Fjords National Park in our monthly data.