Showing posts with label mammal. Show all posts
Showing posts with label mammal. Show all posts

Thursday, April 7, 2011

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. 

Wednesday, April 6, 2011

Panda Bear



Giant Panda (pinyin: Xiong mao), Ailuropoda melanoleuca ("Foot-and-white-black cat") or summarized Panda, is a mammal usually classified in the bear family, Ursidae, which is native to central China. The Giant Panda lives in mountainous regions, like Sichuan and Tibet. In half of the 20th century the last, the panda became a kind of symbol of Chinese nation, and now displayed in the gold country.Her Chinese name means "cat-bear," and can also be read in reverse sense. He named the panda in the West because it is similar to the Red Panda, and formerly known as Bear Belang (Ailuropus melanoleucus).

Although the taxonomic he is carnivorous, herbivorous food like most plants, nearly only bambusaja. Technically, like many animals, the panda is omnivorous (Can be called Carnivore, Omnivore, Herbivore), because they are also known to eat eggs, and insects along with bamboo. Both these foods are sources of protein are required.Telinganyabergerak-motion as they chew.The Giant Panda is also still brothers with the Red Panda, but they are named like their eating habits seem to akrena bamboo. Prior to its relationship with Red Panda was discovered in 1901, the Giant Panda known as two-colored bear.For many decades the precise taxonomic classification of the panda is debatable because both Giant Panda and Red Panda has the characteristics such as bears and raccoons. However, genetic testing revealed that Giant Pandas are true bears and including the family Ursidae. Closest relatives in the bear family is bespectacled bear in South America. It's still debatable whether the Red Panda, including family Ursidaea tau rakut family, Procyonidae.Giant Panda including endangered species, threatened by habitat loss and very low birth rates, either in nature or in the cage. About 1,600 are believed still alive in the wild. The Giant Panda is the symbol of the World Wildlife Fund (WWF), nature conservation organizations.The Giant Panda has claws that odd, with the "thumb" and five fingers; "thumb" is actually bone-modified wrist. Stephen Jay Gould wrote an essay on this topic, then use the title The Panda's Thumb for a book of collected essays.


The Giant Panda was first known in the Western world in 1869 by French missionary Armand David (1826-1900). Giant Panda long been a favorite animal communities, partly because the species is cute like a baby, similar to a teddy bear to live. Panda also often pictured lounging, eating bamboo, not hunting, so that adds to its image as a sweet and peaceful animals.Borrowing large pandas to the zoo the United States and Japan is an important part of diplomacy, People's Republic Cinapada the 1970's because borrowing is marked in part the first cultural exchange between China and the West.However, in 1984, the panda is no longer used as a tool of diplomacy. Instead, China began to offer pandas to other countries to borrowing only ten years old. Provisions include a standard lending rate to $ 1,000,000 per year and the requirement that children born during the loan is owned by the People's Republic of China.



In1998 due to lawsuits by the WWF, U.S. Fish and Wildlife Service requires that U.S. zoos that want to import pandas for ensuring that China mounted a half fare channeled to efforts to conserve wild pandas and their habitats, then the agency would issue a permit the importation of pandas.