Baby Hippopotamus Hippo Coloring Book Pages

Baby hippos. Females have a gestation period of eight months and have only one baby at a time, according to the San Diego Zoo. At birth, the baby, called a calf, is a whopping 50 to 110 lbs. (23 to 50 kg). For 18 months, the baby nurses while its mother is on land, or it swims underwater to suckle.