Family: Sylviidae, Old World Warblers and Gnatcatchers view all from this family

Description 4 1/2 -5" (11-13 cm). Similar to Black-tailed Gnatcatcher, but black cap of adult male more extensive; 2 outer tail feathers wholly white.

Habitat Streamside thickets.

Nesting 3 or 4 pale blue, spotted eggs in a small, smooth cup nest placed in mesquite or other desert bush or a low tree.

Range In the United States found only in southeastern Arizona (Sonoita Creek).

Voice Buzzy and whining calls like those of Blue-gray Gnatcatcher.

Discussion This is a Mexican species that barely crosses the border into southern Arizona. It prefers moister environments than the Black-tailed Gnatcatcher.