In the United States, there are usually 2 brood attempts per year, in mid-April to mid-to-late June and then again in July to mid-August. These dates overlap with the peak nectar availability in the broad-bill hummingbirds' habitats. In Arizona, pairs breed in semi-open habitats at 914 to 1524 meters in elevation. In southern Mexico, the species breeds over a long period of time. The bird's sex organs have been shown to be able to breed from January to August. In Sonora and western Mexico, breeding starts mid-January, peaking in Mid March and ending in August.