ID please

Taken at feeder in southwest Montana. I also observed a male which I am almost sure was a Black-chinned Hummingbird which leads me to believe that this is a female Black-chinned.

http://www.pbase.com/image/156862443

http://www.pbase.com/image/156862443

I have subsequently identified this as a Rufous Hummingbird. I now have seen as many as six at my feeders at one time and have images to definitely make ID.