Black-chinned HummingbirdArchilochus alexandri
3 1/4-3 3/4" (8-10 cm). A small hummingbird. Male green above with iridescent black chin underlined by violet-purple throat band. Female green above with white throat and breast, buff sides, and white-tipped outer tail feathers. See Costa's Hummingbird. In East, female not distinguishable in field from female Ruby-throated.