The nests have to be very soft and warm; house Hippos sleep about 16 hours a day.
House Hippos sleep about 16 hours a day. The nests have to be very soft and warm.
The nests have to be very soft and warm. House Hippos sleep about 16 hours a day.
The nests have to be very soft and warm. House Hippos sleep about 16 hours a day.