Corcoracidae

Corcoracidae is a small family of birds native to Australia, containing only two species. These are the White-winged Chough and the Apostlebird. Both species are medium-sized passerines, typically around 30-40 cm in length, and are characterized by their dark plumage, often with lighter undersides or wing patches. They share a distinctive pinkish or yellowish beak and bright eye rings.

The White-winged Chough, Corcorax melanoleucos, is found across eastern and southern Australia, inhabiting a range of woodland and forest types. It is known for its social behavior and complex cooperative breeding system. Several adults will help a breeding pair raise their young, sharing incubation, feeding, and nest defense duties. Their nests are cup-shaped structures built from mud.

The Apostlebird, Struthidea cinerea, is found in inland eastern Australia, preferring drier woodlands and acacia scrub. As its name suggests, it also exhibits strong social tendencies, typically living in groups of around six to twelve birds, though larger flocks can occur. Like the chough, they are cooperative breeders, with non-breeding members of the group assisting in raising the young. Apostlebirds also build mud nests, often communally.

Both species are omnivorous, feeding on insects, spiders, seeds, and small invertebrates. They are highly vocal birds, with their calls often heard before the birds themselves are seen. The Corcoracidae family is a unique example of avian social structure and cooperative breeding within the Australasian region.