Magpie-larks build an unusual mud nest and generally breed from August to December (though may occasionally breed outside this time). During the breeding season both the male and female gather wet mud and construct a bowl-shaped nest on a horizontal branch, or similar site, often up to 20 m above the ground. The bowl is lined with feathers and grasses. The male and female birds often sit side by side and call alternately, each raising and lowering their wings as they do so. Magpie-larks aggressively defend their nest and territory, which may occupy up to 10 ha. Both parents share the incubation duties and care for the young. If conditions are favourable, more than one brood may be reared in a year.