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 has been spotted in Milwaukee under the Hoan Bridge, the first confirmed sighting of the species in Wisconsin.

A Kelp Gull, which is native to the coasts in the southern hemisphere, was seen nesting with Herring Gulls in Milwaukee, Wisconsin, officials said.