The Blue Bonnet (Northiella haematogaster) is a species of bird native to Australia. It is the only member of the genus Northiella. Its habitat includes open woodland, scrub, river forest, spinifex (a type of Australian grass), and farmlands. It is found throughout the eastern half of Australia, and a smaller race is found in the western Australian Nullarbor (flat, almost treeless, arid or semi-arid country immediately north of the Great Australian Bight) region.
This bird is about 10.6 to 13.75 inches long. Sexes are similar in appearance. Birds that are kept in captivity have duller plumage than birds in the wild. The Blue Bonnet is often seen in pairs or small groups feeding along roadsides. Breeding takes place between July and December. The female lays 4 to 7 white eggs.
The genus name commemorates the Australian ornithologist Alfred John North.