A melanistic jet-black phenotype Eastern Gray Squirrel - 'Black Morph'
Lived in Fairfax, Va for 8 years; Warrenton, Va for 25 years, and never say a black squirrel.
Here in the White Post, Va area (this one spotted at Lake Frederick) been seeing lots of these.
It's only 43 miles from Warrenton to White Post, go figure. See 'next' for a closer look.