I suppose this week will be somewhat dedicated to the desert of southern Arizona. For better or worse. That being said, it was pretty darn hard to ignore the cactus wrens in Organ Pipes. They scream a pretty song and nest inside cactus plants, flying from saguaro to cholla and back again - a rather remarkable adaptation that's even more alarming than it's voice. If you've ever had a jumping cholla grab hold of you, you know how bad that can hurt. (For more traveled destinations, beware of the cholla garden in Joshua Tree.) The cactus wren is the largest of North American wrens and is native to the southwestern United States on down to central Mexico.MP3: Joni Mitchell - Cactus Tree