Length 1.0-1.2 m, mass 4.2-5.8 kg, males larger than females
Plumage is blue-grey except for white crown and lores.
Grassland, short scrubland, wetlands, cultivated pastures and crop lands.
In pairs or family groups when breeding, otherwise in large flocks.
Food includes invertebrates, frogs, reptiles, fish, leaves and seeds.
The nest is a thinly lined scrape on dry ground or pad of vegetative material on marshy ground. One or two eggs are laid October to February.