This picture is one of a series of photos from Fontainebleau State Park in Mandeville, Louisiana. It was taken from the pier at the beach on Lake Pontchartrain at quite a distance from the bird. I had been watching the gulls for a while and missed several splashdowns as they dove in for food.

Sizes here are (in inches): small - 12 x 4, medium - 24 x 8, large - 30 x 10