Australian White Ibis

Identified by its almost entirely white body plumage and black head and neck. Head is featherless and its black bill is long and down-curved.
During the breeding season the small patch of skin on the under-surface of the wing changes from dull pink to dark scarlet.
Adult birds have a tuft of cream plumes on the base of the neck.
Females differ from males by being slightly smaller, with shorter bills.