The Rock Wren is a sparrow-sized passerine with a repertoire of 100 or more vocalizations. The name derives from its preferred habitat: dry, sparsely vegetated open spaces altered by man, such as quarries, open mine pits, levees, breakwaters, and barren ocean bluffs. I discovered one on the breakwater of Morro Bay. It seemed to follow me around and sing me a song. This post is its story.