Brown-backed Solitaires are ordinary-looking: medium-sized, gray-brown birds. But they have one of the most melodic, complex songs in the world, ringing out year-round in high-altitude forests from Mexico to Central America.More info and transcript at BirdNote.org. Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.