Each is distinct in plumage, voice, habitat preference, and abundance. Also eat a few seeds.
Shrubs provide roosting, nesting, and other cover.
No information found, but probably not a requirement. P. melanura is most numerous in desert wash habitat with dense mesquite, paloverde, ironwood, acacia. Yearlong, diurnal activity. Probably equal to territory, at least in breeding season. May. Incubation 14-15 days, by both sexes.