I have occasionally observed him even eating Sequoia seeds and nibbling a troublesome flea, without ceasing or in any way confusing his "Pee-ah! pee-ah!" for a single moment.
While ascending trees all his claws come into play, but in descending the weight of his body is sustained chiefly by those of the hind feet; still in neither case do his movements suggest effort, though if you are near enough you may see the bulging strength of his short, bear-like arms, and note his sinewy fists clinched in the bark.
Whether going up or down, he carries his tail extended at full length in line with his body, unless it be required for gestures.

But while running along horizontal limbs or fallen trunks, it is frequently folded forward over the back, with the airy tip daintily upcurled.

In cool weather it keeps him warm.

Then, after he has finished his meal, you may see him crouched close on some level limb with his tail-robe neatly spread and reaching forward to his ears, the electric, outstanding hairs quivering in the breeze like pine-needles.

But in wet or very cold weather he stays in his nest, and while curled up there his comforter is long enough to come forward around his nose.