Archilochus alexandri

At this time of year, we have two hummingbird species that are relatively common -- Black-chinned Hummingbirds and Broad-tailed Hummingbirds. The females are much harder to distinguish than the males are, since both are basically green on their backs and white on their bellies. The Black-chinned are smaller, and the Broad-tailed have some brownish feathers between the white on their bellies and the green on their backs. The Broad-tailed Hummingbirds also make a whistling noise when they fly (especially the males). So, I am only about 90% sure this is a Black-chinned female, but after a few weeks of seeing very few hummingbirds at all, I now regularly see females chasing and catching insects in the early morning light. This one took a pause to get a sip of nectar from the feeder.