One of the largest birds in North America, with a 9-foot wingspan. Similar to Brown Pelican in shape but much larger, and very different in habits: Occurs far inland, feeds cooperatively in shallow lakes, does not dive from the air for fish. Despite its great size, a spectacular flier, with flocks often soaring very high in the air, ponderously wheeling and circling in unison.
Birds by Dave 
Love these!! I recall being amazed the first time I saw them in person – they ARE huge!