Be very careful with the hippos in the water safari camp made from Eagle Island Camp by Orient Express, outside the Moremi Game Reserve in Botswana. The common hippopotamus is the third largest land animal in the world today (after the elephant and the white rhinoceros). They can live in water or land navigate, and its specific gravity allows them to sink and walk or run under water along the bottom of rivers. They are considered current megafauna, but unlike all other African megafauna, have adapted to a semi-aquatic life in rivers and freshwater lakes. Due to its large size, hippopotamuses are difficult to weigh in nature and most of the estimates of its weight in the wild come from operations in the 1960s. The average weight for adult males between 1500 and 1800 kg. Females are smaller than males, with average weights between 1300 and 1500 kg.9 Older males reaching weights much larger, reaching at least 3,200 kg and sometimes up to 4500 kg. The males seem to grow throughout their lives, while females reach a maximum weight at around age twenty-five. They measure between 3.3 and 5.2 meters long including the tail, of about 56 cm, and about 1.5 m tall at the shoulders. The range of common hippo measures overlaps with the white rhino, the use of different metrics makes it difficult to establish which of these two animals is the largest land animal after elephants. Despite being a chubby-looking animal with its large barrel-shaped torso, on land can run faster than a human. Estimates of their running speed vary from 30, 40, or even 50 km / h, it can only maintain these high speeds over short distances. His mouth is huge and their jaws can be opened at an angle of 150 degrees, the neck is short and robust and greatly elongated body and thick, with the back to the rump higher than in the cross and buried in the central part, the belly, broad and rounded, is hanging and comes to touch the ground when the animal walks through a swamp. The eyes, ears and nostrils are located on top of the head, allowing them to stay in the water with most of the body immersed in the water and mud of tropical rivers to stay cool and avoid sunburn. Has short legs with four fingers well developed in each terminated in hoof and graviportal skeletal structure is adapted to support the great weight of these animals. Like other aquatic mammals, the hippopotamus has very little hair. Although not a ruminant stomach has a complex comprising three divisions or chambers. The skin is smooth with pleats on the chest and neck and almost hairless except for a short bristles on the head and tail. It is gray purple, with the lower body and around the eyes and pinkish brown ears, are common cases of albinism. The epidermis (outer layer) is uniformly thin, and the endodermis varies from 5-6 cm in back and rump less than 1 cm in head and belly. Their skin secretes a natural sunscreen reddish, which causes sometimes say that "blood sweat," but is neither blood nor sweat, this secretion is initially colorless, for a few minutes and eventually turn red orange color brown. We have identified two different pigments in the secretions, one red (hiposudárico acid) and one orange (norhipposudoric acid). Both are highly acidic compounds and inhibit the growth of disease-causing bacteria on the other hand, the light absorption of these pigments reaches the ultraviolet range having an effect sunscreen. All hippos, even with different diets, secrete these pigments, so it does not seem to occur based on their supply. In contrast, animals can synthesize protein precursors pigments, as the amino acid tyrosine. They have 2-3 pairs of incisors and canines of the lower jaw have the appearance of two large tusks, which can be overcome in the case of males 50 cm in length (half in the case of females) and achieve a 4 kg weight, are triangular, curved in a crescent shape, blunted at the end thereof and provided with longitudinal grooves. The tusks of the upper jaw are much shorter and weaker, and also curved and blunt at the tip. We measured the bite force of a adult female hippo at 8100 N