Brown Pelican on rooftop

Yesterday at Lincoln City on the Oregon Coast some gulls were attracted to the sight of bread crumbs being thrown out on the deck of a beach house. Suddenly among the flurry of wings there was a pair of much larger wings as an adult Brown Pelican came in to claim a share of the crumbs. I was surprised to see a Pelican eating bread, and was made to wonder if there might be a shortage of a Pelican's usual food in the ocean along this coast.