Masked Bobwhite Quail- Colinus virginianus ridgwayi- often called the Sonoran Bobwhite because of its habitat in the Sonoran Desert and in the State of Sonora, Mexico, is a subspecies of Colinus virginianus. Until the nineteenth century, the bird was common in parts of southern Arizona; Sonora, Mexico, and possibly even further south. The advent of cattle ranching in Arizona and Mexico, however, meant trouble for the Masked Bobwhite.
Cattle grazing in bobwhite habitat consumed the grasses that quail depended on so heavily for food, shelter, and nesting. Cattle trampling the ground also compacted the soil preventing seeds of native grasses from germinating. Drought conditions in the 1890s killed even more native grasses. After 1900, the Masked Bobwhite Quail was extinct or very rare in Arizona.