Editing Screamer (section)

==Distribution and habitat==
The three species occur only in [[South America]], ranging from [[Colombia]] to northern [[Argentina]]. The horned screamer was once present on the [[Caribbean]] island of [[Trinidad]], but is now extirpated from there. They are large, bulky birds, with a small downy head, long legs and large feet which are only partially webbed. They have large [[Spur (zoology)|spurs]] on their wings which are used in fights over mates and territorial disputes;<ref name=Todd/> these can break off in the breast of other screamers, and are regularly renewed. Unlike ducks, they have a partial [[moult]] and are able to fly throughout the year.<ref name=Todd/> They live in open areas and marshes with some grass and feed on water plants. One species, the southern screamer, is considered a [[pest (animal)|pest]] as it raids crops and competes with farm birds.