Tiny, long-tailed, with a thin bill. Soft blue-gray upperparts and slightly paler underparts. Note the thin white eyering. Males have black forehead. Forages for insects with diverse songbird flocks in a variety of wooded or brushy habitats. Active and twitchy; tail often seems loose. When separating from Black-tailed Gnatcatcher, try to confirm tail pattern from below: nearly all white, not black.