Lucifer Hummingbird - Calothorax lucifer (Arizona)

''The tiny, vividly purple-throated Lucifer Hummingbird is mainly a species of northern Mexico and central Mexico. Where it reaches the United States, in extreme southern Arizona, New Mexico, and west Texas, it's a highly sought-after species among avid birders. Lucifer Hummingbird belongs to a group of hummingbird species called “sheartails,” named for their deeply forked, narrow tail.

Unlike other hummingbirds, which perform courtship displays near feeding areas, perches, or special sites for group displays, the male Lucifer Hummingbird performs its displays at the nest of a female.''

https://www.allaboutbirds.org/guide/Lucifer_Hummingbird/overview