Display consists of the male flying back and forth between two perches, a vertical flight followed by a powerful spiraling dive towards the female, ending with erratic lateral flight. Copulation has yet to be observed. Breeding season is known to last from April to August. They also often go on specific flycatching flights. Males defend nectar plants against all conspecific hummingbirds, as well against black-chinned hummingbirds.
Females defend the areas around the nests against other female hummingbirds and predator species.
Social behavior between adults and juveniles does not exist. Habitat Habitats vary widely depending on the geographic location. The Lucifer hummingbird can be found in the plains, foothills, and on the sides of rocky hillsides throughout its range. While other hummingbird species perform flight displays away from nesting sites, the Lucifer hummingbird displays at the nests of females during nestbuilding and egg-laying. The Birds of North America.