Burrowing Parakeets excavate deep nest tunnels in sandstone and limestone cliffs in Argentina and Chile. The colony’s many tunnels zigzag and interconnect, creating an intricate labyrinth. Their nesting colonies are among the largest of any parrot — one in Argentina has 70,000 birds!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.