A tiny, long-tailed, fluffy gray ball of a bird. Distinctly drab brownish-gray with a stubby dark bill. Multiple populations differ slightly: eye color ranges from dark to pale, and some have black cheeks. Constantly in motion; active, twittering flocks move quickly through bushes and trees. Listen for their high-pitched, scratchy calls. Found in brushy woodlands and pine-oak forests in western North America, south to Guatemala.