Layard's Warbler Curruca layardi

A stout grayish warbler with a pale eye, a streaky throat, and a pale whitish undertail. Pairs occupy scrubby bushes mostly in semi-arid rangelands, often preferring areas with boulders and slopes. The species often sings a short melodic phrase of 6-10 notes, most notes repeated 2-3 times, interspersed with scolding and chattering. The very similar Chestnut-vented Warbler differs from Layard’s Warbler by having a rufous-colored undertail.