The Sharp-billed Canastero is a small Furnariid of Patagonia. While it breeds in southern Argentina and Chile, some birds migrate to the northeast in winter, reaching Uruguay, Paraguay, and Bolivia. The species resides in steppe scrub where it climbs around in spiny vegetation and is often detected by its ringing song and calls. Sharp-billed Canastero can be identified by its gray head and dull brownish body with a long, graduated tail with rufous on the outer three pairs of rectrices, a slim, pointed bill, and a small red patch on the throat. It often flips its tail around when excited which is also useful when trying to separate the species from Patagonian and Cordilleran Canasteros visually.