Agriculture
Protecting Cows—and People—from a Deadly Disease
Vitamin D-licious Mushrooms
Growing Healthier Tomato Plants
Amphibians
Bullfrogs
Poison Dart Frogs
Salamanders and Newts
Animals
Sleepless at Sea
Professor Ant
Fishing for Giant Squid
Behavior
The Smell of Trust
Making Sense of Scents
Two monkeys see a more colorful world
Birds
Emus
Cardinals
Backyard Birds
Chemistry and Materials
A Light Delay
Mother-of-Pearl on Ice
Pencil Thin
Computers
Look into My Eyes
New eyes to scan the skies
The hungry blob at the edge of the universe
Dinosaurs and Fossils
The bug that may have killed a dinosaur
Dino Babies
Early Birds Ready to Rumble
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Rodent Rubbish as an Ice-Age Thermometer
Groundwater and the Water Cycle
Life trapped under a glacier
Environment
Pumping Up Poison Ivy
Shrinking Fish
Fishing for Fun Takes Toll
Finding the Past
Traces of Ancient Campfires
Stone Tablet May Solve Maya Mystery
If Only Bones Could Speak
Fish
Dogfish
Carp
A Jellyfish's Blurry View
Food and Nutrition
Recipe for Health
A Pepper Part that Burns Fat
Eat Out, Eat Smart
GSAT English Rules
Order of Adjectives
Whoever vs. Whomever
Pronouns
GSAT Exam Preparation Jamaica
GSAT Exam Preparation
Results of GSAT are in schools this week
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Exams Jamaica Scholarships
GSAT Scholarship
GSAT stars reap scholarship glory
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Prime Time for Cicadas
How to Slice a Cake Fairly
Deep-space dancers
Human Body
Teen Brains, Under Construction
Cell Phones and Possible Health Hazards
Cell Phone Tattlers
Invertebrates
Grasshoppers
Scorpions
Nautiluses
Mammals
Minks
Blue Bear
Humpback Whales
Parents
Children and Media
Raise a Lifelong Reader by Reading Aloud
Choosing a Preschool: What to Consider
Physics
Invisibility Ring
Powering Ball Lightning
Speedy stars
Plants
Fast-flying fungal spores
The algae invasion
Making the most of a meal
Reptiles
Geckos
Komodo Dragons
Asp
Space and Astronomy
Unveiling Titan
Sun Flips Out to Flip-Flop
Holes in Martian moon mystery
Technology and Engineering
Weaving with Light
Young Scientists Take Flight
A Micro-Dose of Your Own Medicine
The Parts of Speech
What is a Preposition?
What is a Verb?
Adjectives and Adverbs
Transportation
Reach for the Sky
Flying the Hyper Skies
Morphing a Wing to Save Fuel
Weather
Recipe for a Hurricane
Arctic Melt
Catching Some Rays
Add your Article

Vampire Bats

Vampire bats are bats that feed on blood (hematophagy). There are only three bat species that feed on blood: The Common Vampire bat (Desmodus rotundus), the Hairy-legged Vampire bat (Diphylla ecaudata), and the White-winged Vampire bat (Diaemus youngi). All three species are native to the Americas, ranging from Mexico to Brazil, Chile, and Argentina. Contrary to popular belief, these bats rarely bite people because they apparently dislike human blood. The Nose Knows: Unlike Fruit-eating bats, the Vampire bats have a short, conical muzzle without a nose leaf. Instead they have naked pads with U-shaped grooves at the tip. The common vampire bat also has specialized infrared sensors on its nose. A nucleus has been found in the brain of vampire bats that has a similar position and has similar histology to the infrared nucleus of infrared sensitive snakes. A Liquid Diet: They have small ears and a short tail membrane. Their front teeth are specialized for cutting and their back teeth are much smaller than in other bats. Their digestive systems are also specialized for their liquid diet. The saliva of Vampire bats contains a substance, draculin, which prevents the victim's blood from clotting. They, therefore, lap blood rather than suck it as most people imagine. They Come Out at Night: They come out to feed only when it is fully dark. Like Fruit-eating bats, and unlike insectivorous and fish-eating bats, they only emit low-energy sound pulses. The Common Vampire bat feeds mostly on the blood of mammals, whereas the Hairy-legged Vampire bat, and the White-winged Vampire bat feed on the blood of birds. Once the common Vampire bat locates a host, usually a sleeping mammal, they land and approach it on the ground. A recent study found that common vampire bats can, in addition to walking, run at speeds of up to 1.2 meters per second. They possibly locate a suitable place to bite using their infrared sensors. Problem Pee: The feeding pattern of the vampire bat adds a layer of complexity to its anatomy. Because they often do not find host organisms for many hours and may have to fly a long distance to do so, vampire bats usually feed in enormous quantities. This influx of proteins may make the bat too heavy to fly. Accordingly, the bat's urinary system accommodates this by releasing dilute urine consisting of a lot of water and fewer solutes. However, when the bat is resting, a new problem is faced. The large amounts of protein create excess urea and must be disposed of. The urinary system of the vampire bat then uses various hormones to make concentrated urine -- consisting of more urea and less water. Blood Transfusion: Vampire bats tend to live in almost completely dark places, such as caves, old wells, hollow trees, and buildings. Colonies can range from a single individual to thousands. They often roost with other species of bat. They will almost always have only one offspring per breeding season. Each colony will typically contain only one reproducing male, with around twenty females and their offspring. They need blood at least once every few days to survive. If they can't get blood, they'll approach another vampire bat whilst roosting, asking for a blood 'transfusion'. The blood is exchanged mouth-to-mouth in a motion that looks very much like kissing. Vampire bats can live up to 9 years in the wild and up to 19 in captivity. Mixed Bag: Vampire bats are common carriers of the deadly rabies virus which, aside from its danger to humans, is responsible for the deaths of many thousands of farm animals each year in tropical and sub-tropical America. However they do have some benefits, in a study which appeared in the January 10, 2003 issue of Stroke: Journal of the American Heart Association, a genetically engineered drug called desmoteplase based on the saliva of Desmodus rotundus was shown to improve stroke patients. 3 of a Kind: The three species are quite different from each other, and are therefore placed within different genera (no other species are currently classified in any of the three genera concerned). But they are related. In older literature, the three genera are placed within a family, Desmodontidae, but this is now regarded as unhelpful, as it hides the similarities the Vampire bats have with other members of the American leaf-nosed bat family, Phyllostomidae. They are therefore now grouped as a subfamily, the Desmodontinae within the Phyllostomidae. The fact that the three known species of Vampire bat all seem more similar to one another than any of them is to any other species suggests that sanguivory (feeding on blood) only evolved once, and that all three species share a common ancestor.

Vampire Bats
Vampire Bats








Designed and Powered by HBJamaica.com™