Frogs

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					Frogs
Prehistoric Frogs
         • Did you know amphibians
           have been around for...
           an estimated 350 million
           years. The earliest known
           frog appeared about 190
           million years ago, during
           what is known as the late
           Jurassic period.
                Amphibians
• Frogs are amphibians,
  animals that spend part
  of their lives under
  water and the
  remainder on land
• They have long
  powerful back legs
  that they use for
  jumping.

• They have short
  backbones.
 All the Better to See You With!
• Eyes
  Frogs have keen
  eyesight to locate
  prey.
  They see colors and in
  dim light.
  Their bulging eyes see
  in all direction
• Frogs have a reputation
  for leaping that is well
  deserved. Launched by
  their long legs, many
  frogs can leap up to
  twenty times their body
  length. (That would be
  about a 100-foot jump
  for you or me!) The
  longest frog jump on
  record was made by a
  frog named Santjie at a
  frog derby held in South
  Africa. Santjie bested
  the competition with a
  jump of 33 feet 5.5
  inches
• Most frogs
  have teeth
  (in the upper
  jaws only)
  but toads do
  not have any
  teeth.
                  Life Cycle
• Like all amphibians,
  frogs spend their lives
  near water because
  they must return to the
  water to lay their eggs
                  Frog Eggs
• Frog eggs are laid in
  the water.
• After about 10
  days a tadpole
  wriggles out of    Tadpoles
    each egg. At
 first the tadpole
   breathes and
    moves like a
   fish, using its
   gills and long
         tail.
• After 5 weeks, they
  lose their tail, and they
  grow lungs that they
  use to breathe. It has
  teeth that lets it eat
  plants and it can also
  eat insects.
• It takes three years for
  the frog to go through
  its life cycle .
• In harsh climates, frogs
  bury themselves in sand
  and mud and hibernate
  (sleep very deeply)
  through the cold winter.
• When temperatures drop,
  some frogs dig burrows
  underground or in the mud at
  the bottom of ponds. They
  hibernate in these burrows
  until spring, perfectly still and
  scarcely breathing. Wood
  frogs can live north of the
  Arctic Circle, surviving for
  weeks in a frozen limbo
  state. This frog uses glucose
  in its blood as a kind of
  antifreeze that concentrates
  in its vital organs, protecting
  them from damage while the
  rest of the body freezes
  solid.
• Frogs can be found on every
  continent except Antarctica.
• Though they thrive in warm,
  moist tropical climates, frogs
  also live in deserts and high
  on 15,000 foot mountain
  slopes. The Australian water-
  holding frog is a desert
  dweller that can wait up to
  seven years for rain. It
  burrows underground and
  surrounds itself in a
  transparent cocoon made of
  its own shed skin.
• Like all amphibians,
  frogs are cold-
  blooded, meaning
  that their body
  temperatures
  change with the
  temperature of their
  surroundings.
                 Protection
• Some frogs use
  camouflage to avoid
  predators. The
  patterns and colors
  of a frog's skin, and
  sometimes the
  shape of its body,
  can help it blend into
  its surroundings.
                     Diet
• Frogs eat any animal
  they can capture and
  swallow, including
  worms, insects,
  crustaceans, other
  frogs, snakes, and
  even small mammals
  and birds.
• They have webbed
  feet for swimming.
• They have suction
  disks on their feet to
  help them climb
                      Predators
• The primary predators of
  frogs are fish, although a
  variety of birds, mammals,
  snakes, crustaceans, and
  insects prey on these frogs
  and their tadpoles.
• Humans hunt these frogs
  for their meat (frog legs).
• Bullfrogs also prey upon
  each other.
           Did You Know?????
• A frog's skin is not
  waterproof! In fact, frogs
  can absorb both oxygen
  and water through their
  skin. This quality makes
  frogs particularly
  vulnerable to pollutants in
  the air or water - they
  suffer from pollution even
  when they don't eat or
  drink it through their
  mouth.
  Did You Know that Frogs Fly?
• Well, it's not exactly
  flying, but certain tree
  frogs in South America
  and Asia do get airborne.
  When a flying frog leaps
  between tree branches, it
  glides down gently with
  its toes outspread. The
  webbing between the toes
  catches the air and the
  frog sails as if carried by a
  parachute. The "flight"
  can cover more than 50
  feet!
•
• Frogs come in a wide
  range of sizes and a
  rainbow of colors. The
  goliath frog of West
  Africa is the size of a
  small dog, measuring
  about 15 inches from nose
  to rump. On the other end
  of the scale is Pyllophryne
  didactyla, the world's
  smallest frog, which is
  found in Brazil. This little
  frog is about the size of a
  firefly and could sit easily
  on top of a pencil eraser.
•
        Do Frogs Cause Warts?
• You may have heard
  this before, but it's just
  not true. A toad's skin
  may be bumpy and
  warty-looking, but if
  you touch a toad, you
  will not get warts!
• Leopard Frog

• This is a typical
  jumping frog,
  with powerful
  back legs. It's
  native to the NE
  and N-Central US.
• Fire-Bellied Toad
  From Korea and north
  China, this frog has a
  spotted camouflaged
  back. When startled, it
  flips over or bends
  backward to show its
  bright belly as a warning
  - poisonous! This toad
  lacks the vocal sack that
  is present in most other
  frogs & toads, so its call
  is very weak and can
  only be heard over very
  short distances.
• Smoky Jungle Frog
 From the Amazon Basin
 in South America, this big
 frog is 5"-6" long. It
 spends most of its time in
 the jungle, away from
 ponds and streams. To
 keep her eggs moist, the
 female oozes a liquid
 from her body, beats it
 into a frothy foam with
 her back feet, and
 deposits her eggs in the
 foam. The outside of the
 foam hardens into a shell
 that protects the eggs
 and keeps them moist.
• Argentine Leaf-
  Folding Frog These
  frogs reproduce by
  depositing a
  gelatinous clutch of
  eggs into a leaf
  funnel over water,
  by folding a leaf and
  gluing it together
  with a sticky bodily
  secretion. Tadpoles
  hatch and fall into
  the water below!
• Dyeing Poison
  Arrow Frog This
  poison arrow frog is
  found in Guyana,
  along the northern
  Brazilian border.
  Toxins from the
  frog's skin must
  enter the
  bloodstream to be
  lethal. Natives
  believe that an
  irritated frog, when
  rubbed on a bald
  spot of a parrot, will
  cause the feathers to
  grow in red.
• Blue Poison Arrow
  Frog One of the
  largest poison arrow
  frogs, up to 2" long,
  this frog is found
  only in a single
  partially wooded
  savannah region of
  Surinam. It was
  discovered in 1969.
  A spawning frog lays
  just 4-6 eggs under
  leaves by a pool.
• The Tomato Frog is
  from Madagascar.
  This species is
  endangered, but
  there is a species of
  Tomato Frog that is
  not endangered and
  is sometimes
  available from reptile
  dealers.
• The Red-Legged
  Frog is from
  northwestern
  North America.
  This one is about
  2-1/2 inches long.
• This African
  Bullfrog looked
  like he was
  having a bad frog
  day! He's huge
  and warty, a good
  6" across the
  middle, and had
  settled himself
  into a nice mud
  puddle. A fully
  grown one can be
  the size of a
  football!
• This is a picture of a
  'banana box' frog, sent
  from Australia. Actually it
  is a Dainty Green Tree
  Frog from Queensland,
  Australia but these frogs
  grab a ride on produce
  such as bananas as they
  are shipped down south to
  places like Victoria. It is
  estimated that 6,000 to
  8,000 frogs end up in
  Melbourne (Victoria,
  Aust.) from Queensland
  each year.
• 1. they spend part of their
  life cycle on land and
  some in water
  2. have a permeable skin
  (which allows substances
  to move relatively freely
  into its body) and
  3. absorb and concentrate
  (make stronger) toxins
  (poisonous substances) in
  their fatty tissues

				
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posted:11/11/2011
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