Zebra black and white at birth. Plains and mountain zebra foals are protected by their mothers, as well as the head stallion and the other mares in their group. Grévy's zebra foals have only their mother as a regular protector, since, as noted above, Grévy's zebra groups often disband after a few months. Attempts have been made to train zebras for riding, since they have better resistance than horses to African diseases. While occasionally successful, most of these attempts failed due to the zebra's more unpredictable nature and tendency to panic under stress. For this reason, zebra-mules or zebroids (crosses between
Zebra duiker at birth. During the first ten days after birth, referred to as the lactation period, a newborn grows at a rate of about 94 g/day. After that, the growth rate decreases considerably. Females reach sexual maturity at 9–12 months of age and males reach sexual maturity at 12–18 months. "Cephalophus zebra" is the only duiker species with the diploid number 2n=58. Zebra duikers have displayed diurnal activity when living in captive situations, but mostly nocturnal in the wild. They are solitary animals that form pair bonds for breeding purposes. Both the male and female participate in the defense of young