Your dog is familiar with the local wildlife and has, in fact, made a comprehensive study of it. She can identify all of the fauna, which happen to be varieties of the common Eastern gray squirrel (Sciurus carolinensis). This field guide by cartoonist Megan McKay of Doodle for Food details the various subspecies of the squirrel.
I have seen all of these in my area, from time to time, aside from the Danger Squirrel. The most hazardous is the Dramatic Squirrel, which I would prefer to describe as the “Danger Squirrel”. They can grow to surprisingly huge size, have sharp teeth, and not the slightest bit of fear about my charging Pit Bull.