#7. "RE: Is this a Northern Flicker?" In response to Reply # 2 Thu 14-Mar-13 01:50 PM by aolander
There is a Yellow-shafted Northern Flicker and a Red-shafted, eastern and western variants respectively. Your photo is of the Yellow-shafted. They have different head markings, so you may have seen images of the Red-shafted.
Forgot to mention earlier that there are male/female differences, too.