The Ratchet-tailed Treepie is a crow-family bird of Southeast Asian forests. Its long tail has deep notches at the tips.
Its plumage is blackish with a faint sheen on the head, wings, and tail. The long tail feathers end in paired points, and the sexes look alike.
It lives in moist lowland forest, is usually seen in pairs or family groups, and feeds on insects and other invertebrates.
An extinction-risk assessment has not been added yet.