Ibises range in length from about 55 to 75 cm (22 to 30 inches). They occur in all warm regions except on South Pacific islands. They wade in shallow lagoons, lakes, bays, and marshes and use their slender, down-curved bills to feed on small fishes and soft molluscs. They fly with neck and legs extended, alternately flapping and sailing. Ibises usually breed in vast colonies, building compact stick nests low in bushes or trees and laying three to five eggs, usually dull white or mottled with brown.