The Laughing Gull, above in its autumn plumage, is native to the Americas.
In summer breeding plumage it has a fully dark grey-black head with white eye-rings and red bill.
It is named after its raucous call. The taxonomic name meaning laughing gull was already taken by the Eurasian Black-headed Gull.
The Laughing Gull, above and below in its winter plumage. Photos in winter plumage were taken by Alexandra Makhnina.

Juvenile Laughing Gull - they take 3 years to reach full adult plumage.

Laughing Gulls in winter plumage on a beach (with a Turnstone).