The bad news was that the bugs didnât die nearly as quickly as other studies had found, a mere hour or two at -16Â° or -17Â° Celsius. âIn our study, bedbugs survived lower temperatures, with eggs surviving in short-term exposures â¦ to temperatures as low as -25Â° C,â the researchers write. But the bugs are not freeze tolerant, the scientists found, and they can be killed â no matter their stage of life or feeding status.
1 The average weight of the hippopotamus male measures around 1.500 â 1.800 kg (3,300 â 4,000 lb). 2  Males are slightly heavier as compared to females. 3  However, females weigh around 1,300 â 1,500 kg (2,900 â 3,300 lb).
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.ippos are amphibious animals and spend up to 16 hours per day in the water, according to National Geographic. The water keeps them cool in the African heat. They spend all day in the water and then hunt for food at night.