Today was the first time I had seen this bird over at a pond in Willcox, AZ. I can't find a match in Sibley's. Let me know what it might be. Comments welcome as well as name.
Info: 40D 300 w/2x, 1/250, f5.6, ISO 200
This is a male bufflehead. Skiddish little buggers here on LI, sure wish I had this in my files! (Personally, I'd recompse this image so he's not swimming out of the frame. Beautiful irredescent colors on his head well shown by you.
I agree with the cropping suggestion. Nice job with tis contrasty subject. We have lots of them here in coastal Alaska, but getting near one is another story.