Plain Thornbird

The plain thornbird is 16 to 17 cm (6.3 to 6.7 in) long and weighs about 20 to 31 g (0.71 to 1.1 oz). The sexes have the same plumage. Adults of the nominate subspecies have a dull brown stripe behind the eye on an otherwise pale buff-brown face. Their crown and upperparts are dull brown. Their wings are mostly dull brown with darker brown primary coverts and some rufescence. Their tail is dull brown. Their throat is pale and the rest of their underparts are mostly dirty buff-white. Voice: The plain thornbird's song is "a bright, chippery and energetic series of loud 'chit' or 'chee' notes, often given in duet, which accelerates slightly, before gradually slowing and dropping in pitch" and is frequently repeated. Its calls include "a sharp 'chip' or 'chek, or a metallic 'tsi' ".