The Rusty-margined Guan (Penelope superciliaris), is a species of bird of the Cracidae family of chachalacas, guans, and curassows. It is found in the dry regions of northeast and southeast Brazil. It is also found in the southeast Amazon Basin, Paraguay, extreme northeast Argentina, and eastern Bolivia. Its habitats are subtropical or tropical moist lowland forests and subtropical or tropical dry shrubland.
This bird is long and slender and is mostly gray above with white wing striping. The underparts are reddish-brown. It has a red throat patch, reddish eyes, and long dull-red legs.