Showing posts with label mamal. Show all posts
Showing posts with label mamal. Show all posts

Tuesday, August 28, 2012

Dhole, Cuon Alpinus.

In India there are bears, leopards and tigers. Three big predators that at the same time have a common predator and not humans. The most dangerous animal of South Asia is the Dhole, also called  Asiatic wild dog or Indian wild dog.

Do not rely on appearance similar to a clever but harmless fox, Dhole is a predator  bold and is able to hunt large and dangerous animals such as water buffalo that easily weigh 1 ton.

It is said that this wonderful animal is the predator king of India, and that are more dangerous than the tigers. In fact, we know that in many cases the Dholes attack and kills  tigers. Those tigers are defending hedging its bets with a tree or a rock are the ones most likely to survive. But the tigers run off are bitten and bled and fall prey depletion of cuones. While it is true that on many occasions some Cuon alpinus falls victim to the claws of the tiger.
But if someone Dhole is hurt when hunting , this individual is protected and cared for the herd. And they are very social animals. And herd are numerous, several individuals, 20 or more individuals.
Dhole herds can also steal a leopard prey, while the leopards can kill them if they are found alone or in pairs.

Unlike herd of wolves, herds of several females have procreative cuon. They are more social and less territorial than wolf packs and unlike these, is said not to live in packs, but form clans. The difference of this technique is hunting.

Well, it's like a medium sized dog, like a coyote, reddish like a fox and a short snout shorter than other species of the family Canidae. Weighs no more than 20 kg. His body is well proportioned, its members are moderately long, and proportional chest. They have great leaping ability and to make great leaps, up to 3.5 m high and 6.5 m long ... quite an athlete.

It is endangered because of the elimination of habitat and prey. Besides competing directly with men.

Monday, May 21, 2012

Echidnas or spiny ansteater. Evolutionary experiment.

This animal is called echidna or spiny ansteater, and has a characteristic that is shared only by another animal, the platypus. Like this, the echidna is the only mammal born from an egg ... I find it strange?
I explain briefly:

The earliest forms of childbearing occurred in prehistoric ocean water. The fish gave birth to many small fish of the sea and of those, many were devoured. To avoid this, the evolution devised some different formulations of childbearing: some fish were hidden in the mouth of the mother, others sought shelter in ... for example anemones ... and other small fish were kept in capsules viscous. The last way to protect the lineage separated was evolved over time in typical eggs of reptiles.

The capsules were no longer viscous but tough. Eggs that were getting the fetus evolve and grow into predators, hunters and adults, but with a smaller size. When mammals appeared, how to give birth to offspring changed. The egg was fertilized in the mother and, even without having the capabilities of an adult, was birthed. Of course had to be cared for and fed by the mother, trying to ensure that offspring born (usually) helpless.

Well, in this evolutionary path of procreation, which seems normal that any mammal born from the mother and then her nursing care and to become more, not an egg as birds or reptiles. That is because the echidna evolutionary peculiarity: the echidna is born from an egg, therefore, how they procreate is not like reptiles but not like that of mammals.

But the way to incubate the egg is not such as birds or reptiles. The echidna lays an egg and it's in a cavity of the body to the coat. This allows you to navigate and provide warmth and protection while ... a good idea talking about survival. Then yes, the small born and would do what any mammal: nursing.

Wednesday, July 6, 2011

Desmodus rotundus or common vampire.

Vampires have given rise to many legends and stories of yesteryear who have forged a popular place in our unconscious.Possibly the best known is the story of Dracula or the Chupacabra,fantastic creatures that attack their victims (humans and animals)sucking all the blood and literally leaving them dry.

The vampire Desmodus rotundus is the best known and most extensive habitat in the world. The most characteristic feature of this vampire is the way you eat, of course, is sucking the blood of their victims.

At night is most active, and is nourished by blood, mostly fromlarge mammals such as horses and cattle. It has been observedfeeding on the blood of chickens and also attacks humans.

The first thing is to bite, a bite surface in order to go licking theblood from the wound. The common vampire bat's saliva has a powerful anticoagulant (which began to be used in medicine) and prevents the wound from closing until the end.

There are two main dangers for the animal victims of this mammal.

1 - If an animal (a cow) is attacked by several individuals of vampires, and for several days. Literally left without blood, causingthe death of the animal.
2 - You can transmit diseases, including rabies.

But the common vampire bat has a nice side ... Their high intakemay share with others of their species to survive. Because onlythose who receive the food could die because they can not be more than 48 hours without eating.

As I said before, the bad reputation of this animal does not correspond with reality. It was possibly attributed due to the damageproduced in animals that fulfilled an important role in rural societiesof yesteryear.

You may be interested Acerodon jubatus.

Wednesday, September 2, 2009

Short-eared Dog

The Short-eared Dog has short and slender limbs with short and rounded ears. The Short-eared Dog has a distinctive fox-like muzzle and bushy tail. It ranges from dark to reddish-grey, but can also be nearly navy blue, coffee brown, dark grey or chestnut-grey, and the coat is short, with thick and bristly fur.[citation needed] Its paws are partly webbed, owing to its partly aquatic habitat.

It moves with feline lightness unparalleled among the other canids. It has a somewhat narrow chest, with dark colour variation on thorax merging to brighter, more reddish tones on the abdominal side of the body. This species possesses a large elongated head and long canine teeth, protruding even when its muzzle is closed. Its back often has a dark streak, while a brighter stain is on its tail. Like all canids, it has 42 teeth.

Typical height at the shoulder is 25-30 cm. Its head and body length is about 100 cm, with a tail of about 30-35 cm. It weighs about 9–10 kg.

This wild dog is mainly a carnivore, with fish, insects, and small mammals making up the majority of its diet. An investigation led in Cocha Cashu Biological Station in Peru into the proportions of different kinds of food in this animal's diet produced the following results: fish 28%, insects 17%, small mammals 13%, various fruits 10%, crabs 10%, frogs 4%, reptiles 3%, birds 10%.


Tuesday, August 18, 2009

Red Panda

The Red Panda is quite long: 79 to 120 cm (31 to 47 in), including the tail length of 30 to 60 cm (12 to 24 in). Males weigh 4.5 to 6.2 kg (10 to 14 lb); females 3 to 4.5 kg (7 to 10 lb). The Red Panda is specialized as a bamboo feeder, with long and soft reddish-brown fur on upper parts, blackish fur on lower parts, light face with tear markings and robust cranial-dental features. The light face has white badges similar to those of a raccoon, but each individual can have distinctive markings. Its roundish head has medium-sized upright ears, a black nose, and very dark eyes: almost pitch black. Its long bushy tail with six alternating yellowish red transverse ochre rings provides balance and excellent camouflage against its habitat of moss- and lichen-covered trees. The legs are black, short with thick fur on the soles of the paws hiding scent glands and serving as thermal insulation on snow-covered or ice surfaces. The Red Panda is specialized as a bamboo feeder with strong, curved and sharp semi-retractile claws standing inward for grasping of narrow tree branches, leaves and fruit. Like the Giant Pandas (Ailuropoda melanoleuca), it has a “false thumb” that is an extension of the wrist bone.

Sunday, August 16, 2009

The wisent or Eurasian bison.

The wisent (Bison bonasus), also known as the European bison, is a species of Eurasian bison. It is the heaviest surviving land animal in Europe; a typical wisent is about 3 m (10 ft) long and 1.8 to 2.2 m (6 to 7 ft) tall, and weighs 300 to 920 kg (660 to 2,000 lb). It is typically lighter than the related American Bison (Bison bison), and has shorter hair on the neck, head and forequarters, but longer tail and horns. Wisent are now forest-dwelling. They have few predators (besides humans) with only scattered reports from the 1800s of wolf and bear predation. It is not to be confused with the aurochs, the extinct ancestor of domestic cattle.

In 1996 the IUCN classified the wisent as an endangered species. It has since been downgraded to a vulnerable species. In the past it was commonly killed to produce hides and drinking horns, especially during the Middle Ages.