sage thrasher

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A grayish-brown songbird (Oreoscoptes montanus) that nests in sagebrush and cactus in dry regions of western North America.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A thrasher (Oreoscoptes montanus) which is a pale gray-brown above and white with brown streaks below and inhabits sagebrush regions in south-western North America.