This Western species of woodpecker is common in our area. It is similar to Downy's but smaller by a couple inches.
5/18/07 Nuttall's Woodpecker (Picoides nuttallii) on the Engelmann Oak.
Description from the Kaufman Focus Guide: "...fairly common, from oak groves and canyons in the foothills to larger trees on the coast. Black back with narrow white barring; thin white stripes on black face. Male has red crown patch. Voice: Sharp ka-teak, as if announcing itself; also a chattering whinny or rattle."