(Colinus ridgewayi)
A smaller species of the bobwhite, known as the masked bobwhite, were
reasonably plentiful along the border of southern Arizona and south
through the state of Sonora, Mexico. Like the typical bobwhite they
were strictly a field and grass bird. But through the heavy pasturing
of that section, together with a series of dry seasons denuding the
whole country of such cover as would be necessary for their protection
from hawks and vermin, they have become nearly if not quite extinct.
They differed from the eastern bobwhite in that the male had a black
throat instead of a white one and a bright cinnamon breast. The
female differed also in having a light buff throat, and generally of a
lighter color.