Range still expanding in many areas, and today the ring-billed may be the most populous gull in North America, with an estimated 3 to 4 million individuals (70 percent nesting in Canada).

Their family — Laridae — is large and diverse, with 36 gull species known in North America. ... only one ring-billed gull was tallied on each of the annual Columbus Christmas Bird Counts.

The vagrant kelp gull mated with a local herring gull, though the chick did not survive. Experts say it's a "complete mystery ...

A kelp gull, a species typically found along coasts in the Southern Hemisphere, is frequenting the roof of a building along the city's Lake Michigan shore. The kelp gull in Milwaukee has ...

The herring gull, a large gull with a gray back and yellow beak, is probably the most common one you've seen on the beach. Ring-billed gulls are smaller and you'll likely see them in parking lots.

This photo of a ring-billed gull on the shores of Lake Washington, from a repeat Reader's Lens contributor, is technically wonderful and wonderfully whimsical.

Out of 50 gull species, 13 were recorded as using urban areas to breed, while 13 were recorded using urban areas to forage for food. Nine species bred and fed in more building-heavy environments.