The American Avocet (Recurvirostra americana) is a large wader in the avocet and stilt family, Recurvirostridae. This avocet has long, thin, gray legs, giving it its colloquial name, "blue shanks". The plumage is black and white on the back with white on the underbelly. The neck and head are cinnamon colored in the summer and gray in the winter. The long, thin bill is upturned at the end. The adult is about 45 cm (18 inches) tall.