Friday, March 4, 2011

"Animals Conversation"(Bat Features)

Panama Adaptable Bats..Winged Victors
Seventy-four species of bats flourish on one small Panamanian island, carving out distinct niches for habitat and forage.
Ozark Big-Eared Bats...The Ozark big-eared bat is an endangered species found only in a small number of caves in the southern central United States. Also known as the western big-eared bat, the long-eared bat, and the lump-nosed bat, its appearance is defined by a pair of outsize ears and a lump-adorned nose.

These bats, whose bodies are normally less than 4 inches (10 centimeters) long, have ears that extend more than an inch (2.5 centimeters) in length. Their ears are generally held erect, except during hibernation, when some bats coil them like ram’s horns.

Beyond the mythical ears, these bats have two distinctive facial glands on either side of their nose resembling a pair of mittens. Their fur is light to dark brown, and their bellies are tan. They have a sizeable wingspan as well, measuring some 12 to 13 inches (30 to 34 centimeters).

The Ozark big-eared bat feeds primarily on moths but may also eat other bugs in and around its forested hunting grounds. It makes its home in caves, relying on their protection during hibernation and maternity.

Mating among these bats is initiated with ritualized calls and affectionate head nuzzling. The female stores the male’s sperm until spring, when ovulation, fertilization, and gestation occur. A single baby, or pup, is born in May or June, already weighing one-fourth of an adult's body weight. Baby bats mature quickly becoming fully independent and able to fly within two months.

The Ozark big-eared bat once lived in caves in Missouri, Arkansas, and Oklahoma. However, they have apparently abandoned their Missouri habitat due to human encroachment and cave disturbance, and estimates put the remaining wild population at around 1,800. Conservationists are currently working to protect these numbers by minimizing human intrusions.
Common Vampire Bats(unique among mamals,the common vampire bat feeds entirely on blood sucked from its warm-blooded prey)Bats are the only mammals that can fly, but vampire bats have an even more interesting distinction—they are the only mammals that feed entirely on blood.

These notorious bats sleep during the day in total darkness, suspended upside down from the roofs of caves. They typically gather in colonies of about 100 animals, but sometimes live in groups of 1,000 or more. In one year, a 100-bat colony can drink the blood of 25 cows.

During the darkest part of the night, common vampire bats emerge to hunt. Sleeping cattle and horses are their usual victims, but they have been known to feed on people as well. The bats drink their victim's blood for about 30 minutes. They don't remove enough blood to harm their host, but their bites can cause nasty infections and disease.

Vampire bats strike their victims from the ground. They land near their prey and approach it on all fours. The bats have few teeth because of their liquid diet, but those they have are razor sharp. Each bat has a heat sensor on its nose that points it toward a spot where warm blood is flowing just beneath its victim's skin. After putting the bite on an animal, the vampire bat laps up the flowing blood with its tongue. Its saliva prevents the blood from clotting.

Young vampire bats feed not on blood but on milk. They cling tightly to their mothers, even in flight, and consume nothing but her milk for about three months.

The common vampire bat is found in the tropics of Mexico, Central America, and South America.
African Bat Biodiversity Project

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