*_Hippopotamus amphibius_* - *Birth:* Hippos give birth to a single calf (twins are rare ) after a gestation period of about 8 months. Calves are born underwater and can weigh around 25-45 kg. Mama hippo helps them to the surface for air . Calves are pretty clued in - they can swim and start eating solids around 3 weeks old . - *Food:* Hippos are herbivores and nom on grasses, aquatic plants, and other greenery. They can eat up to 35 kg of food per night . Hippos are pretty efficient grazers, of