When a six-year-old tourist asks, "What for is a cactus?" this wren is your answer. He lives in it. He also lives in the zizyphus bush. A homebody with a passion for real estate, he builds several nests, repairs them constantly, installs wall-to-wall featherbeds and burglar-proofs them with stilettos, ice picks and bayonets. His chut, chut, chut is a splash of color on a Dali landscape. Having lived here all his life, he knows a secret way through the pass.