Breeding season: August to December. Clutch size two to four. They mate for life and maintain a home range of about 20-30 km square throughout the year. Pairs may hunt co-operatively, with one member, usually the male, scattering a flock of birds while the other swoops down to attack a particular individual. This co-operative behaviour is most often observed during the breeding season. Rather than building a nest, it lays its eggs in recesses of cliff faces, tree hollows or in the large abandoned nests of other birds. The female incubates the eggs, and the male hunts.