The scrubtit (Acanthornis magna) is a species of bird in the thornbill family Acanthizidae. It is endemic to Tasmania and King Island in Australia. Its natural habitat is the temperate rainforest, Nothofagus beech forest and eucalypt woodland. It is a small species that resembles the Sericornis scrubwrens (with which it was once placed).
The scrubtit is 11 to 12 cm long and weighs around 10 g. The plumage consists of a white throat and belly, a brown back, crown, flank and tail, black wings and grey on the face. The eye is pale and the bill is short, black and slightly curved. The species is often silent, but makes quite loud contact calls and has a song described as "sweet [and] musical".