The Johns Hopkins University Press. All rights reserved. This document may be used, with this header included, for noncommercial purposes within a subscribed institution . No copies of this work may be distributed electronically outside of the subscribed institution, in whole or in part, without written permission from the JHU Press .
Males usually are larger than females.
Coloration of wild forms is dark gray to black or brown. The body is covered with stiff bristles and usually some finer fur, but the pelage often is quite scant, and the tail is only lightly covered with short hairs. Many individuals have side whiskers and a mane on the nape. The young are striped. Hogs have four continually growing tusks, two in each jaw.