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)
Bonaparte's gull (Chroicocephalus philadelphia) is a gull found mainly in northern North America. At 28 to 38 cm (11 to 15 in) in length, it is one of the smallest species of gull. Its plumage is mainly white with grey upperparts. During breeding season, Bonaparte's gull gains a slaty-black hood. The sexes are similar in appearance. Wikipedia →
Closest Relatives at Badlands National Park
Ring-billed Gull
Larus delawarensis
Franklin's Gull
Leucophaeus pipixcan
Killdeer
Charadrius vociferus
Upland Sandpiper
Bartramia longicauda
Wilson's Phalarope
Phalaropus tricolor
Marbled Godwit
Limosa fedoa
Long-billed Curlew
Numenius americanus
Lesser Yellowlegs
Tringa flavipes
American Avocet
Recurvirostra americana
Solitary Sandpiper
Tringa solitaria
Greater Yellowlegs
Tringa melanoleuca
Stilt Sandpiper
Calidris himantopus
📅 Monthly Probability
Fewer than 5 records of Bonaparte's Gull at Badlands 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