2 black phase seen.
At campus of western Washington University. A black variant present as well
Common color variety in this introduced species.
Donna said these are in Golden Gate Park, but I don't think I've ever seen them this dark there...
Grey color. Very bushy tail. Scampers quickly up the trees and onto the branches. Eats a lot of walnuts.
Melanistic subgroup. Was moving too fast to get a good picture of with he light fading.