I believe it's a juvenile or a female, as there isn't really any prominent red as there is on adult males. As most of the hummingbirds go to warmer areas for the winter, Anna's hummingbirds stick around.
Slightly forested area
This little guy spent about 5 minutes with me, I kept creeping closer until the bushes held me back. He didn't seem bothered by me, but eventually flew away.