The Grey Vireo (Vireo vicinior) shows only faint traces of the typical vireo spectacles and wingbars. This vireo is grey above, and dull white below. It has a single faint wing bar and eye-ring; and a short, thick bill. The sideways twitching of its tail is unique among vireos and is reminiscent of that of gnatcatchers. Its preferred habitat includes the dry brush on the slopes of the southwestern mountains. Its distribution stretches from the southwestern United States and Baja California Sur to western Texas. It migrates to Mexico for the winter.