Neotamias ochrogenys, Yellow-cheeked Chipmunks, are only found near the Coast in Northern California. Peter has recently been able to photograph them.
Peter says they are very elusive. Members of the squirrel family, they are associated with redwood trees. I have never seen one, but I will be looking for them now that I know what they look like.
Thanks to Peter for allowing me to share his photo with you here.