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.
PowerPoint Slideshow about 'Frogs' - shayna
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EyesFrogs 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
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.
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.
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.
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.
This is a typical jumping frog, with powerful back legs. It's native to the NE and N-Central US.
Fire-Bellied ToadFrom 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 FrogFrom 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.
Dyeing Poison Arrow FrogThis 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.
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.