Vampire bats

Vampire bat is said to have killed five children in Peru. Is it true they really suck blood and kill their prey? Vampire bat derived from mammalian order Chiroptera, Phyllostomidae included in the family and subfamily: Desmodontinae. Called vampire bats because their food source is blood, either human or animal (nature of food called hematophagy). There are three kinds of bats eat only blood, Desmodus rotundus, Diphylla ecaudata (legged and hairy), and Diaemus youngi. The three species of native Americans, and many found ranging from Mexico to Brazil, Chile, and Argentina. Because of the differences between the three species, they each placed in different genera, each consisting of one species. In the older literature, these three genera are placed within their own families, Desmodontidae, but taxonomists now classify them as a subfamily, in leafy nose bat family, Phyllostomidae. 

The fact that three species of vampire bats are known all seem more similar to each other than other species showed that sanguivorous habits (eating blood) only evolved once, and that the three species share a common ancestor. Unlike other bats that eat fruit, vampire bats have short conical snout. It also does not have a nose leaf, and do not have naked pads with U-shaped grooves on the end. Vampire bats generally have small ears and short tail membrane. Their front teeth for cutting and their back teeth much smaller than other bats. their digestive systems adapted to their liquid diet, and their saliva contains a substance draculin, which prevents the clotting of blood from their prey. Do they suck blood? Not so, vampire bats do not suck blood, but blood licked at the site of bleeding. In the brain has the inferior colliculus, a part of the brain that can analyze the process of bat sounds. Yes, these bats will just lick the blood of the sleeping prey. These bats also have strong family ties with members of the colony. They used to share food. A vampire bat can only survive for two days without a blood meal, and they can not guarantee to find food each night. This poses a problem. When the bats failed to find food, so often he "begged" to share their food with other bats. Another bat will regurgitate a small amount of blood to defend other members of the colony alive. It has been noted by many naturalists as an example of reciprocal altruism in nature. 

Vampire bats are very agile and a recent study discovered that vampire bats in addition to walking, running at speeds up to 7.9 km per hour (4.9 miles per hour), they find a suitable place to bite by using infrared sensors them. They then make a small incision with their teeth and drink blood from his wound. What happened in Peru, where vampire bats are suspected of causing the death of five boys in a week, not because his blood is sucked out. Vampire bats are suspected of being infected with rabies and pass it to their children bitten. So, the boy died of rabies infection, not because of loss of blood due to bite it.