Yup! That diminutive guy is a male ruby crowned kinglet. You got to be
really quick to get any of the kinglets. Fortunately, they don't seem to fear
humans that much, so you can follow them around. Although, that doesn't always
help. I have some very good shots of branches trying to catch these guys.
I do have a shot of a female ruby crowned kinglet for reference. Here it is.
BTW, the other shots a re really good. The second junco is really cute!