A seagull nest on the rooftop of MECA.

Seagull chicks sit atop the rooftop of the Maine College of Art.

Seagulls look on as UNE researchers study the habits of urban seagulls on the roof of MECA in Portland.

A seagull chick is tagged by UNE researchers on the rooftop of MECA.

Dr. Noah Perlut, right, a UNE researcher, walks up to a seagull nest on the rooftop of MECA along with UNE student Chris Watt as they study the habits of urban seagulls in Portland Friday, June 27, 2014. Shawn Patrick Ouellette/Staff Photographer

Seagulls fly overhead as UNE researchers study the habits of urban seagulls on the roof of MECA