Transcript frogslideshow

LIFE AS A FROG
By Lucia Cursio
What is a Frog
 Frogs belong to the zoological class known as
Amphibia.
 Amphibians are cold-blooded vertebrates.
 What sets amphibians apart from reptiles is that
they do not have scales and they generally return
to water to breed.
 Frogs and toads belong to a type called Salientia.
 There are about 3,900 species of tailless
amphibians.
Frog Features
 Frogs have two bulging
eyes that also comes in
different shapes and
colors.
 Frogs have long and
sticky tongues.
 They have smooth or
slimy skin.
 Frogs have special ears
that are connected to
their lungs.
More Frog Features
 Strong,long, webbed
hind feet and long
powerful jumping legs.
 Frogs can leap 20x their
body length.
 Frogs have a very short
backbone.
 Frogs come in every
color of the rainbow.
Frog Skin
 Frogs drink and breathe through their skin by
absorbing the moisture they need. Frogs get
oxygen from their lungs, but also from water.
 Frogs can suffocate from lack of moisture.
 The skin of a frog secretes a mucus that aids in
keeping their bodies moist.
 Frogs shed their skin weekly by stretching
themselves out of their old skin. They pull the
skin off over their heads and then eat it.
Life Cycle of a Frog
Mating

In an embrace called
amplexus, the male frog will
climb on the back of a
female and wrap his arms
around her waist.
 Mating usually occurs in the
water and can last several
days
Fertilization to Tadpole
 Male frogs fertilize the
eggs as they are laid.
 It takes about 6-12 days
for the eggs to hatch.
 The tadpole emerges
with poorly developed
gills, a mouth, and a tail.
 After 7-10 days they will
go from the floating
weeds to feed on the
algae.
 After 4 weeks, gills
disappear & skin is
formed.
 In 6-9 weeks, tiny legs
appear, the head is more
distinct, the body gets
longer, and arms appear.
 After 9 weeks, the
tadpole looks like a small
frog.
Frog Enemies
 Frogs are victims to many types of predators.
 Snakes, lizards, birds, and small animals like
hedgehogs feed on frogs.
 In the water, frogs are eaten by diving birds, sharp
toothed fish, and swimming mammals like the
water shrew.
 Pollution, however, is the largest enemy that frogs
face.
Singing Frogs
 Frogs have sacs or vocal
pouches that allow them
to sing.
 Some frogs can make
noises without a sac.
 Some species of frogs,
only males sing.
 This photo is of a singing
Squirrel Treefrog. The
sac is stretched like a
balloon.