|Non-breeding plumage; black spot behind eye.|
|Breeding adults have black heads.|
|This is a small gull; here with one of our average-sized gulls.|
"Cool facts" from Cornell's All About Birds:
- The Bonaparte's Gull is the only gull that regularly nests in trees.
- During the breeding season, the Bonaparte's Gull feeds mainly on insects, often catching them on the wing.