That's a "Carduelis psaltria" (a little Latin lingo for ya', LOL). Commonly known as a "Lesser Goldfinch". They love to paddle around in the icy water. They are the most playful birds I've ever seen and they have such fun in our fountain. I never see them during the summer, just during December and January. Not much larger than a hummingbird, but tough little things!
Wikipedia - Lesser Goldfinch
Thanks for the "Latin lingo"... hehe.
I'm not a true birder, but I like to try to identify the ones that I see. Their funny ways are delightful to watch. I like wild critters in general, as long as they're not bigger than I am... LoL.
If Lesser Goldfinch only appears there in December and January, it must live further north for the rest of the year... Interesting.