American white pelican (Pelecanus erythrorhynchos) taking flight. The most unique looking of all of Yellowstone's waterfowl is the American white pelican. These birds typically spend their winters down in the coastal waters of Mexico or the southern United States. When it comes time for breeding they head inland to fresh water lakes in the western US and southern Canada. They breed in large colonies on flat isolated islands in larger lakes. Photo © copyright by Robert Faucher.