This is essentially a Rocky Mountain endemic, breeding through the Great Basin ranges to extreme eastern California and south through northern Mexico. It winters in Mexico south to Guatemala. Although a member of the genus Selasphorus, males have a resemblance to the widespread Ruby-throated Hummingbird (Archilochus colubris) of the Eastern US.
In addition to the more wine-red coloration of the throat and white chin, Broad-tailed Hummingbird males have unique pointed primary tips which create a distinctive metallic sounding wing-trill which can be heard from a considerable distance. It sounds somewhat like a shrill Cicada. A close view of this photo barely shows the pointed primary extensions. The spread tail shows rusty colored webbing on the tail. This pattern is also unique to males of this species.
Digiscoped with Panasonic DMC-LZ5 | Nikon FieldScope III | 30XWA | hand-held (no adapter)