Subspecies: megalopterus
Adult in breeding plumage swimming.
212 (1 photos) 2009-04-29 Río Lagartos, Yucatán (Yuc), Mexico
Subspecies: megalopterus
Adult and 2cy birds. The two birds standing above in the middle are probably 3cy showing primaries without white edges and points.
Subspecies: megalopterus
3cy bird. Almost in adult plumage but the inner hand is less well marked with a brownish touch, and the rectrices still contain black spots.
Subspecies: megalopterus
2cy bird. Umistakable in the area, and practically in all of North America with the slender shape, black and white tail and long black bill. Franklin's Gull in same plumage does not have black on the outer web of the outer rectrice.