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 Cumbres de Monterrey National Park
Black Skimmer
Rynchops niger
Royal Tern
Thalasseus maximus
Ring-billed Gull
Larus delawarensis
Laughing Gull
Leucophaeus atricilla
Elegant Tern
Thalasseus elegans
American Herring Gull
Larus smithsonianus
Black-legged Kittiwake
Rissa tridactyla
Least Tern
Sternula antillarum
Black Tern
Chlidonias niger
Spotted Sandpiper
Actitis macularius
Killdeer
Charadrius vociferus
American Woodcock
Scolopax minor
📅 Monthly Probability
Fewer than 5 records of Bonaparte's Gull at Cumbres de Monterrey 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