Anna's Hummingbird?

I visited Oaks Bottom Wildlife Refuge in Portland for the first time today. I started out at Crystal Springs Rhododendron Garden thinking that there may be wintering ducks, but there mostly Mallards and Wood Ducks along with a few American Wigeon and a few Buffleheads on the far side of the large pond. So I only spent about a half hour there and then decided to try Oaks Bottom since it was close and I was limited for time.
Things were fairly slow there too, but I did run into a couple of active areas. In one of these spots, I saw a mixture of Ruby-crowned Kinglets (one showing its bright red crown very nicely), Brown Creepers, Bewick's Wrens and this one Hummingbird I believe to be an Anna's. There is not a lot of difference in Hummingbirds. I believe Anna's and Rufous Hummingbirds to be the most common around here. This one does not appear to have much, if any, rufous coloring which rules out a Rufous or even an Allen's. The dark patch on the bottom image up above also points towards a female Anna's. If there had been any sun shining today, that spot may have shown some iridescent red.

Anna's Hummingbird

These pictures of a male Anna's hummingbird were taken at the Audubon Society of Portland's feeders. I had some trouble with focus on most all of these shots taken through the window at the feeders. I'm not sure if it was the window, slow shutter speeds or just how close they were causing a narrow depth of field. The metallic color of the pinkish red on the head and the green on the body glowed in the sun. However, if the sun light wasn't quite right the feather's color would change, even turning black, especially on the head.