The Verdin is a very small bird. At 4.5 inches in length, it rivals the Bushtit as one of the smallest passerines in North America. It is gray overall, and adults have a bright yellow head and rufous "shoulder patch" (the lesser coverts). Unlike the tits, it has a sharply pointed bill.
Verdins are insectivorous, continuously foraging among the desert trees and scrubs. They are usually solitary except when they pair up to construct their conspicuous nests.
Verdins are permanent residents of the southwestern United States and northern Mexico, ranging from southeastern California to Texas, throughout Baja California and into central Mexico, north of the Trans-Mexican Volcanic Belt.