Corcoracidae

Corcoracidae, known as the Australian mudnesters, is a small family of passerine birds containing two species in two genera: the white-winged chough and the apostlebird. Both are endemic to eastern Australia, living in eucalypt woodlands, forests and arid shrublands, and both have adapted well to farmland and suburban habitats. These medium-sized birds, 31 to 47 centimeters long, have long legs and short rounded wings suited to foraging on the ground, though the two species differ in bill shape: the apostlebird has a short finch-like bill while the white-winged chough has a long curved one. The family takes its name from its defining trait, building nests out of mud. Corcoracids are highly social, living in groups of two to twenty birds led by a dominant breeding pair, and they are non-migratory with unusually long parental care, sometimes lasting up to 200 days.