This elegant warbler of western North America is a relatively common bird of piñon-juniper, pine, and mixed oak-pine forests. The Black-throated Gray Warbler breeds generally west of the Rocky Mountains from northern Mexico to British Columbia, and winters mostly in Mexico. It is a short- to medium-distance Neotropical migrant and, like many migrants, is insectivorous. Unlike some other Neotropical migrants, Black-throated Gray Warbler populations do not seem to have been affected by human activities to any great extent, but changes are difficult to assess because so little is known about many aspects of its natural history. Although nests are not unusually hard to find and are often placed low enough to be observed easily, little information is available on the breeding biology of this species and even less is known of this species on its wintering grounds.