Update with new picture:
This little guy has been lurking and eluding me lately. I have been trying to identify him for a while. Every time he shows up I either don’t have my bird book or don’t have my camera. The last two days were different. I did ID him yesterday with my book, but today I was able to capture him with the camera. Forgive the occasional blur and also forgive the tree branch obstruction of him. I took the pictures through the kitchen window, which doesn’t have modern glass. He only hung out for a few seconds in the Japanese maple before he flitted away again. The little tuft of red only appears on the male and only “when excited” according to All The Birds of North America.
Ruby-crowned Kinglet Regulus calendula