I took some pictures of this hummingbird in my backyard in Manzanita on August 3rd. It looks very much like the Costa's Hummingbird female that visited my backyard last year between August 7 - 28. I was hoping to get more pictures of it, but I've not seen it again yet. There are regular hummingbird wars over the 3 feeders that are out.
Any thoughts on identification? 4 pictures are in a Flickr album.