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Sylvia A

Chiroptera - 0 views

  • Small and furry, bats are the only mammals to have achieved powered flight.
  • Their arms are spindly, with membranes stretched between the fingers on each hand.
  • Despite their resemblance to rodents, bats are not closely related to mice at all. Though their exact placement is still uncertain, there is recent evidence that they may be more closely related to the primates.
Sylvia A

Facts about bats: mammals - 0 views

  • There are more than 1,000 species of bats in the world! They live on every continent of the world, except Antarctica. Bats do not live in areas where it is very hot or very cold, and there are some remote islands that are not home to bats.
  • Bats are mammals. They account for more than 25 percent of all the mammals on the earth! Bats are the only mammals that can fly.
  • Mother bats have one baby in their litter. The baby bats are called “pups.” When a pup is born, it usually has no hair and its eyes are closed. It clings to the mother bat and drinks milk from her. When the pup is about four months old, it learns to fly.
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  • Depending on the species, bats can be gray, brown, white or reddish brown.
  • Bats have teeth and chew their food. Seventy percent of all bats eat insects. One bat can eat more than a thousand insects in one hour!
  • The largest bats have a wingspan of more than six feet. However, most are smaller.
  • Many people do not like bats and are afraid of them because they think all bats have rabies. Rabies is a virus that is transmitted to animals and people through animal bites. A study by the University of Florida has shown less than one-half of 1 percent of all bats have rabies. It is more likely for a person to be bitten by an unvaccinated dog or cat.
  • People also think vampire bats will try to attack humans. That is simply not true.
  • Bats are not a danger to people and are actually quite valuable. Very few carry rabies, and they help to control the insect population. They also help seed new plants and pollinate our crops!
Sylvia A

Vampire bats recognise their prey's breathing ( Vampire bats the only mammals to feed ...) - 0 views

  • Vampire bats, the only mammals to feed exclusively on blood, including human blood, recognize their prey by the sound of its breathing.
  • Vampire bats feed on the same prey over several nights
  • bats use breathing sounds to identify their prey in the same way as humans use voice to recognise each other.
Sylvia A

Bat - Wikipedia, the free encyclopedia - 0 views

shared by Sylvia A on 05 Dec 08 - Cached
  • the only mammals naturally capable of flight
  • Bats are mammals
  • Megabats eat fruit, nectar or pollen
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  • microbats eat insects, blood (small quantities of the blood of animals), small mammals, and fish
  • Mother bats usually have only one offspring per year
  • they are viviparous
  • Young microbats become independent at the age of 6 to 8 weeks
  • At the age of two years, bats are sexually mature
  • megabats not until they are four months old
  • A single bat can live over 20 years
  • Most microbats are active at night or at twilight
  • In Western Culture, the bat is often a symbol of the night and its foreboding nature
  • the rain interferes with their echo location
  • Only three species sustain themselves with blood.
  • Only 0.5% of bats carry rabies
  • Bats have very small teeth and can bite a sleeping person without being felt
  • Bats are closely associated with vampires
  • Bats are also a symbol of ghosts, death, and disease
  • Chinese lore claims the bat is a symbol of longevity and happiness
  • the bat is a trickster spirit
  • Bats rarely fly in rain
  • A measure of the success of bats is their estimated total of about 1,100 species worldwide, accounting for about 20 percent of all mammal species.
Sylvia A

Bats - 0 views

  • Bats often make people think of vampires, creatures of the night, and Halloween. Beyond the myth and folklore, bats are one of the most important groups of animals.
  • Bats are mammals that belong to the order Chiroptera (ky-rop-tera), which means, "winged hand". The wings or hands of a bat have very long finger bones covered by a strong skin. Bats are the only mammals that can fly. Like all mammals, they are "warm-blooded", have bodies covered with fur, and nurse their young (pups) with milk.
  • Nearly all bats are helpful animals. In fact, tropical rainforests could not survive without bats. Bats are responsible for controlling pest insect populations, pollinating flowers, and dispersing seeds.
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  • Bats have excellent night vision. Fruit bats use their eyesight and sense of smell to find fruits and flowers. Bats that hunt insects, fish, or frogs can also "see" with sound. This is called echolocation. Bats that use echolocation usually have large ears and leaf-shaped flaps of skin on their noses. This helps them direct the high frequency sounds they make.
Ann Thomas

Cats and humans share similiar X and Y chromosomes - 0 views

  • The order of these genes on the sex chromosomes of cats more closely resembles that of humans than of any other mammal studied so far, the team reports in a recent issue of Genome Research. Genes on X chromosomes of cats and people are lined up in the same way.
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    Researchers, acting as "genetic paleontologists," recently discovered that the X and Y chromosomes of cats and humans are remarkably alike The order of these genes on the sex chromosomes of cats more closely resembles that of humans than of any other mammal studied so far, the team reports in a recent issue of Genome Research. Genes on X chromosomes of cats and people are lined up in the same way.
Sylvia A

Chiroptera - 0 views

  • One unique feature of bats is their modified forelimbs, which support a wing membrane (patagium). The basic elements of the mammalian limb are present in bats, although the relative sizes of most bones and muscles differ from those of nonflying mammals. The most elongated parts of the limb are those of the hand (metacarpal bones) and fingers (phalanges). The primary functions of these bones in bats is to provide support for the patagium and control its movements.
  • Numerous blood vessels and nerves are present throughout the wing membrane. Bats also have five unique muscles present in the patagium, and use additional muscles in the chest and back to move the wings up and down.
  • The most obvious difference between bird wings and those of bats is that bird wings are made of feathers, not a skin membrane. Birds have an elongated arm, but do not have elongated fingers like bats. Additionally, the muscles used in both the upstroke and downstroke are found in the chest of birds, while the upstroke muscles are on the back in bats (Fenton, 1983).
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  • The orientation of the hindlimb is also unique to bats. The hip joint is rotated 90° so that the legs project sideways and the knee faces almost backwards. Due in part to the rotation of the hindlimb, the walking motion of bats differs from other tetrapods, often appearing awkward. The hindlimb is designed to support the patagium in flight and allow the bat to roost hanging from its hindlimbs. Most bats have a tendon system in the toes that locks the claws in place so the bat can hang upside down even when asleep.
  • The body of a bat is ventrally compressed with a short neck region. The bones tend to be slender and light-weight. The majority of the body weight is concentrated in the chest region due to the large flight muscles.
  • The overall shape of the head varies more in bats than within most other groups of mammals. Some bats have very elongated muzzles while others have broad, short faces. There is a correlation between the shape of the head and the type of food eaten. For example, most nectar feeders have long, narrow muzzles that are good for reaching into flowers, while many fruit eaters have short, broad faces good for biting rounded fruits (Hill and Smith, 1984).
  • The ears range from small and round to large and pointed, and often have a cartilaginous fold (tragus) present at the notch of the ear. There is additional variation in the nasal and lip regions of bats. Some bats have complex noseleafs, folds, or wrinkles on their muzzles.
  • A major misconception about bats is that they are blind. This idea originated from the fact that bats are able to successfully maneuver in the dark and often have small eyes. While some bats do have very small eyes (most Microchiroptera) many have large and complex eyes (Megachiroptera).
  • Bats usually have black or brown fur, although the fur can also be gray, white, red, or orange. In some species there are stripes on the face or down the back, or patches of white on the face or above the shoulder. The length of the fur also varies among species from short and dense to long and fluffy. The wing membrane is usually dark in color, although it may have white on the tips or be a lighter color around the bones in the membrane. A few bats have white or pale yellow wings. There are also little hairs on the membrane itself. These hairs can be the color of the wing or the same color as the body.
  • The bat monophyly hypothesis states the Megachiroptera and Microchiroptera are each others closest relatives in an evolutionary sense (i.e., they form a clade).
Sylvia A

Bats - Animals Of The World - 0 views

  • THE second order of mammals includes the Bats, or Chiroptera, literally hand-winged animals
  • As in the Primates, in which order the Bats were formerly included, there are four kinds of teeth, incisors, canines, premolars, and molars, the milk-set being followed by the permanent.
Sylvia A

All About Bats - 0 views

shared by Sylvia A on 05 Dec 08 - Cached
  • Bats are one of the most prolific forms of mammals with over 900 species living in the world and making up over 20% of all mammals.
  • Most U.S. bats eat insects. A single bat can eat up to 1,200 mosquitoes in one hour.
  • Bats like to come out to eat at night around dusk. Bats flight pattern is much more erratic than birds so look for this pattern.
Tucker Haydon

Kangaroo Info. - 0 views

    • Tucker Haydon
       
      Diet- Grass and other vegetation. Facts- can bound up to 30 feet, reach up to speeds of 55 mph, usualy produce 1 offspring,
    • Tucker Haydon
       
      Kangaroo- Any marsupial mammal found in or on any neighboring islands of Australia. National mammal of Australia. Diet-
Sylvia A

Aerodynamics of Animals - Bats - Intermediate - 0 views

  • The bat is more closely related to primates.
  • Bats are fantastic fliers. They are able to truly fly. Bats are the only mammals able to have powered flight.
  • A bat's body is made for flight. The neck is short, the chest is large and the stomach is narrow. In order to fly a body must have a wide, thin surface. It also needs the power to push through the air.
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  • The wings act like webbed hands. The bat can move its wings like we move our fingers. Bats fold one of their wings to steer and brake.
  • Many bats can hover in one place like hummingbirds and helicopters.
  • Bats live in barns, attics, and caves. They like anyplace that is cold and dark. They usually live in small groups. But their colony size can be in the 1,000's.
  • Tropical bats can transfer pollen as they fly from plant to plant. They digest bananas, mangoes, guavas, and berries in 20 minutes. The seeds of the fruit are dropped by the bats as they are flying. This reseeds large areas of land.
  • There are people who think that bats are dirty and evil. Bats are very clean and groom their wings and teeth daily. Some even believe that Count Dracula turns into a bat. This is not true. Bats are very helpful to man and our environment.
Tucker Haydon

Perentie info. - 0 views

  • largest monitor lizard or goanna native to Australia
  • fourth largest lizard on earth
  • Found west of the Great Dividing Range in the arid areas of Australia
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  • 2.5 metres (8 ft)
  • venomous
  • rapid swelling within minutes, localised disruption of blood clotting, shooting pain up to the elbow, with some symptoms lasting for several hours
  • They can stand on their back legs and tail to gain a better view of the surrounding terrain. This behaviour, known as "tripoding", is quite common to all monitors large and small. Perenties are fast sprinters, running using either all four legs or just their hind legs.
  • Perenties generally forage for their food, but are also known to wait for small animals to come to them. Prey include: Insects Reptiles, including their own kind Birds and birds' eggs Small mammals Carrion Large adults can attack larger prey, like small kangaroos.
Tucker Haydon

Inland Taipan info. 2 - 0 views

  • The round-Snouted head and neck are usually darker than he body (glossy black in winter, dark brown in summer). The eye is of average size with a blackish brown iris.
  • The back, sides and tail may be buff-grey to greyish brown, buff-brown, brown or reddish dark brown
  • shelters in rat burrows
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  • It feeds on small to medium-sized mammals
  • There are about 140 species of snakes in Australia. The most poisonous land snake is the inland tiapan found in south-western Queensland and north-eastern South Australia. Tiger snakes, death adders, copperheads, brown snakes, and red-bellied black snakes are all also highly venomous.
Dani Wiener

Grolier Multimedia Encyclopedia - 0 views

  • prey of wolves are large hoofed mammals, including deer, moose, elk, caribou, bison, musk-oxen, and mountain sheep. Beaver is eaten when available. In summer a variety of smaller foods, such as small rodents and berries, supplement the diet. Animals killed are usually young, old, or otherwise weaker members of their populations because they are easiest to capture.
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    HISD Resource for PLP Research
Tucker Haydon

Perentie info. 2 - 0 views

  • a forked tongue, long slender neck, flattened head, strong tail, powerful legs with 5 clawed toes and numerous sharp-curved backward-pointing teeth.
  • Perenties can be found living in arid regions from Western Queensland to coastal Western Australia, usually around rocky hills and outcrops.
  • turtle eggs, insects, birds, other reptiles (including juvenile Perenties), mammals and carrion. On some of the islands they are often seen scavenging on the beaches for carrion, turtle eggs and almost anything that moves!
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  • six to twelve eggs in termite mounds where the activity of the insects provides constant warmth.
Sylvia A

AWF: Wildlife: Bat - 0 views

shared by Sylvia A on 05 Dec 08 - Cached
  • After rodents, bats are the most numerous mammals on earth.
  • Males have a bright orange ruff and wings are black, which contrast with the tawny body fur.
  • African bats fall into two major categories large fruit bats and smaller, insect-eating bats, none of which attack people.
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  • Bats are primarily found in forests and savannas. Colonies of bats roost together in tall trees.
  • In some parts of Africa straw-colored fruit bats are considered a delicacy. Elsewhere they are considered pests and killed to prevent the destruction of fruit crops. Studies, however, have shown that bats only eat very ripe and unmarketable fruit and may even help reduce fungi and fruit flies in commercial plantations. Bats are also slaughtered because of superstitions and the musky odors and noise emanating from their roosting places.
  • Bats, like most wild animals, will bite if handled, but if left alone they normally will avoid contact.
  • Bats are versatile. The insect-eating type is a natural pesticide. Bat excrement, called guano, is sold as fertilizer. And seed dispersal and pollination activities of certain bats help tropical forests survive.
Tucker Haydon

Dingo Info. - 0 views

    • Tucker Haydon
       
      Dingo: Golden-Reddish Color Introduced to Australia 3000- 4000 years ago Eats small animals and fruit Communicates with howls
  • The dingo is legendary as Australia's wild dog, though it also occurs in Southeast Asia. The Australian animals may be descendents of Asian dingoes that were introduced to the continent some 3,000 to 4,000 years ago. These golden or reddish-colored canids may live alone (especially young males) or in packs of up to ten animals. They roam great distances and communicate with wolf-like howls. Dingo hunting is opportunistic. Animals hunt alone or in cooperative packs. They pursue small game such as rabbits, rodents, birds, and lizards. These dogs will eat fruits and plants as well. They also scavenge from humans, particularly in their Asian range.
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    Information on Dingos Includes size, weight, origin, and some more.
cory delacruz

Cretaceous-Tertiary extinction event - Wikipedia, the free encyclopedia - 0 views

  • More has been published about the extinction of dinosaurs at the K-T boundary than any other group of organisms. Excluding a few controversial claims, it is agreed that all non-avian dinosaurs went extinct at the K-T boundary. The dinosaur fossil record has been interpreted to show both a decline in diversity and no decline in diversity during the last few million years of the Cretaceous, and it may be that the quality of the dinosaur fossil record is simply not good enough to permit researchers to distinguish between the choices.[54] Since there is no evidence that late Maastrichtian nonavian dinosaurs could burrow, swim or dive, they were unable to shelter themselves from the worst parts of any environmental stress that occurred at the K-T boundary. It is possible that small dinosaurs (other than birds) did survive, but they would have been deprived of food as both herbivorous dinosaurs would have found plant material scarce, and carnivores would have quickly found prey to be in short supply.[35] The growing consensus about the endothermy of dinosaurs (see dinosaur physiology) helps to understand their full extinction in contrast with their close relatives, the crocodilians. Cold-blooded crocodiles have very limited needs of food (they can survive several months without eating) while warm-blooded animals of similar size need much more food in order to sustain their faster metabolism. Thus, under the circumstancies of food chain disruption above mentioned, non-avian dinosaurs died [55] while some crocodiles survived. In this context, the survival of other endothermic animals, such as some birds and mammals, could be due, among other
Sylvia A

Bats - Defenders of Wildlife - 0 views

  • the bat’s wing anatomically resembles the human hand
  • Almost 1,000 bat species can be found worldwide.
  • 70% of bats consume insects.
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  • Some bats have evolved a highly sophisticated sense of hearing.
  • Gestation 40 days - 6 months
  • Litter Size Mostly one pupFor their size, bats are the slowest reproducing mammals on Earth.
  • Male bats do not help to raise the pups.
  • The greatest threat to bats is people.
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