Cynanthus latirostris, commonly known as the Broad-billed Hummingbird, is native to the southwestern United States and Mexico. In the United States, it is mainly found in southern Arizona and southwestern New Mexico. In Mexico, it ranges along the western and central parts of the country, extending as far south as Oaxaca.

The Broad-billed Hummingbird typically inhabits arid and semi-arid regions with thorn forests, scrublands, and canyons. It is often found in desert washes, riparian areas, and gardens. The climate in these areas is generally characterized by hot temperatures and low precipitation.

This species plays a crucial role as a pollinator in its ecosystem, primarily feeding on nectar from flowers. Its long bill and specialized tongue allow it to access nectar deep within flowers. Additionally, it consumes small insects and spiders for protein, which is essential for breeding and raising young.