Scientific name: Archilochus alexandri
The Black-chinned Hummingbird is in many respects the western counterpart to the Ruby-throated Hummingbird of the eastern U.S. The Black-chinned Hummingbird is similar in size to its eastern relative, but has a dark purple rather than red gorget, which can appear blackish depending on lighting conditions.
While migratory, Black-chinned Hummingbirds do not have to cross the Gulf of Mexico to reach Mexico directly the way Ruby-throated Hummingbirds do. They can simply move south from the western U.S. into Mexico.