Nutall's Woodpecker シロハラシマアカゲラ

Nuttall's Woodpecker, Picoides nuttallii, is a species of woodpecker named after naturalist Thomas Nuttall in 1843. They are found in oak woodlands of California and are similar to the Ladder-backed Woodpecker (Picoides scalaris) in terms of genetics and in appearance. (wikipedia)

Family:Picidae
Genus:Picoides
Species:P. nuttallii

サンフランシスコの自然公園で撮影しました。