All the movements of the red squirrel are quick, sharp, jerky, machine-like. He does nothing slowly or gently; everything with a snap and a jerk. His progression is a series of interrupted sallies. When he pauses on the stone wall he faces this way and that with a sudden jerk; he turns round in two or three quick leaps. So abrupt and automatic in his movements, so stiff and angular in behavior, yet he is charged and overflowing with life and energy. One thinks of him as a bundle of steel wires and needles and coiled springs, all electrically charged. One of his sounds or calls is like the buzz of a reel or the whirr of an alarm-clock. Something seems to touch a spring there in the old apple-tree, and out leaps this strident sound as of spinning brass wheels. When I speak sharply to him, in the midst of his antics, he pauses a moment with uplifted paw, watching me intently, and then with a snicker springs upon a branch of an apple-tree that hangs down near the wall, and disappears amid the foliage. The red squirrel is always actively saucy, aggressively impudent. He peeps in at me through a broken pane in the window and snickers; he strikes up a jig on the stone underpinning twenty feet away and mocks; he darts in and out among the timbers and chatters and giggles; he climbs up over the door, pokes his head in, and lets off a volley; he moves by jerks along the sill a few feet from my head and chirps derisively; he eyes me from points on the wall in front, or from some coign of vantage in the barn, and flings his anger or his contempt upon me. No other of our wood-folk has such a facile, emotional tail as the red squirrel. It seems as if an electric current were running through it most of the time; it vibrates, it ripples, it curls, it jerks, it arches, it flattens; now it is like a plume in his cap; now it is a cloak around his shoulders; then it is an instrument to point and emphasize his states of emotional excitement; every movement of his body is seconded or reflected in his tail. There seems to be some automatic adjustment between his tail and his vocal machinery. The tail of the gray squirrel shows to best advantage when he is running over the ground in the woods--and a long, graceful, undulating line of soft silver gray the creature makes! In my part of the country the gray squirrel is more strictly a wood-dweller than the red, and has the grace and elusiveness that belong more especially to the sylvan creatures. The red squirrel can play a tune and accompany himself. Underneath his strident, nasal snicker you may hear a note in another key, much finer and shriller. Or it is as if the volume of sound was split up into two strains, one proceeding from his throat and the other from his mouth.