rock wren

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several wrens of the genus Salpinctes, especially S. obsoletus, found in rocky regions of the western United States and Mexico.
2. n. A small wren (Xenicus gilviventris) that inhabits New Zealand and feeds mostly on the ground among stones.

GNU Webster's 1913

1. n. (Zoöl.) any one of several species of wrens of the genus Salpinctes, native of the arid plains of Lower California and Mexico.

WordNet 3.0

1. n. short-tailed bird resembling a wren
2. n. wren inhabiting badlands and mesa country of western United States and Mexico