The black-chinned hummingbird (Archilochus alexandri) is a small bird found in western North America. It is a member of the family Trochilidae, which also includes hummingbirds, emeralds, and woodstars. The black-chinned hummingbird is known for its distinctive black chin, which is present in both males and females. The species is sexually dichromatic, with males having a bright iridescent gorget (throat patch) that is iridescent green, blue, and violet. The black-chinned hummingbird is a migratory species, wintering in Mexico and Central America and breeding in the western United States and Canada.
The black-chinned hummingbird is an important pollinator of many plants, including wildflowers, shrubs, and trees. The species is also a popular bird for birdwatchers, due to its small size, bright colors, and active behavior.