thus forced by the necessity of saving themselves to quit their young,
they seldom, if ever, return to them. When a large herd of these wild
animals are crossing a river, the calves or yearlings manage to get on
the backs of the cows, and are thus conveyed safely over."

5. _The Yearling._--During the first five months of his life, the calf
changes its coat completely, and becomes in appearance a totally
different animal. By the time he is six months old he has taken on all
the colors which distinguish him in after life, excepting that upon his
fore quarters. The hair on the head has started out to attain the
luxuriant length and density which is so conspicuous in the adult, and
its general color is a rich dark brown, shading to black under the chin
and throat. The fringe under the neck is long, straight, and black, and
the under parts, the back of the fore arm, the outside of thigh, and the
tail-tuft are all black.

The color of the shoulder, the side, and upper part of the hind quarter
is a peculiar smoky brown ("broccoli brown" of Ridgway), having in
connection with the darker browns of the other parts a peculiar faded
appearance, quite as if it were due to the bleaching power of the sun.
On the fore quarters there is none of the bright straw color so
characteristic of the adult animal. Along the top of the neck and
shoulders, however, this color has at last begun to show faintly. The
hair on the body is quite luxuriant, both in length and density, in both
respects quite equaling, if not even surpassing, that of the finest
adults. For example, the hair on the side of the mounted yearling in the
Museum group has a length of 2 to 21/2 inches, while that on the same
region of the adult bull, whose pelage is particularly fine, is recorded
as being 2 inches only.