The large head, long, slender neck and elongated, trailing tertials are diagnostic of this species.
Juvenile lacks the long inner tertials and is paler grey, especially on the head, which is almost white.
Vleis, grassland, Karoo scrub and agricultural lands. Found in small groups or in pairs, but non-breeding birds gather in large flocks that sometimes contain several hundred birds.
A loud, nasal 'kraaaank'.