Habitat
ALL SEASONS: Open country with scattered trees or scrubby growth, most frequently in arid or semi-arid situations, and around cultivated areas, farmlands, parks and gardens (Tropical, less frequently Subtropical zones) (AOU 1983). BREEDING: Usually nests in a tree or shrub; may also nest on a cactus or on a beam of a building. Constructs a small platform nest of twigs, roots, stems, etc. May use the old nest of another species.
Ecology
Gathers into flocks of up to 50 individuals in fall and winter; seen singly or in pairs during summer (Terres 1980). Groups may huddle together on cold days in winter in north. In Mexico, had linear breeding territories in riparian area of 0.2-0.5 hectares (Johnson 1960).