Master 2138, Tape 1 MS tree with den hole. MS Gray Squirrel (Sciurus carolinensis) climbs down tree. MS a second squirrel climbs down the tree and into the den. The first squirrel goes into the den. Two more squirrels dash down the tree and into the den. MS squirrel sitting above the den entrance and another squirrel's head sticking out of the den. A second squirrel sticks his head out of the den. Second squirrel retreats into the den; only one squirrel looks out.