I've seen my Ruby throated perch on the top of the bird feeder for hours on end but now understand why. I also didnt know they ate insects as much as they do.
Yes several!!! Living in Indiana USA I am limited to primarily Bee Hummingbirds more specifically Ruby Throated. However while traveling in California this past year, I was able to photograph some Anna's and I believe a couple of Rufous Hummingbirds.