Амазонская курутия Cranioleuca vulpecula

Rusty above with pale brown underparts, a whitish throat, and a long spiky tail. Occurs on shrubby river islands favoring early successional vegetation. Song is an accelerating and descending series of “tew” notes, ending in a trill. The rather similar Rusty-backed Spinetail has buffy underparts, a less distinct eyebrow, and a different song, and occurs in seasonally flooded forests and gallery forests.