Anna’s Hummingbird (Calypte anna), formerly regarded as a California species (Ridgway 1890), has extended its range in recent years. In Arizona, the species was thought to be a fall and winter resident only, with no positive breeding records prior to the mid-1960s (Phillips et al. 1964). Spring occurrences were not documented until after 1964, and only rarely prior to the 1970s were the birds noted in summer (Zimmerman 1973). The species first nested near Tucson in 1972; young fledged 14 March (Calder 1974). In Arizona, Anna’s Hummingbird’s breeding is confined mainly to cities (Zimmerman 1973).