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2013-11-13 来源: 类别: 更多范文

Kimberly Gavin Gavin 1 Judith Palmer English November 12, 2010 Frogs and Toads Most of the people find it difficult to differentiate a frog from a toad. They normally mix them up. Although they seem so similar in appearance, they certainly have numerous dissimilarities too. Frogs are found in many different shapes, sizes, colors, and textures. Frogs have smooth, wet skin. They live most of the time in or near water. They have different eye colors including brown, sliver, green, gold and red along with different shapes and sizes of pupil. Some of the frogs have sticky padding on their feet while others have webbed feet. It is obvious that not even all the frogs have same qualities. Toads too have numerous shapes, sizes and texture, but they don’t have much variety in color. Toads are chubby and have warty skin. They do spend most of their time in water, but they live in moist places like woods, fields and gardens. Their pupils do have different shapes, sizes and colors, but generally they are egg-shaped, small and black. Usually they have webbed feet. Toads and frogs have the same way to catch and eat food. Both of them use their tongue to and gulp down the prey, but a frog has a crest of very small cone teeth around the upper jaw edge to seize the food but a toad doesn’t have any teeth at all. They eat almost same foods as frogs like bugs insects, fish and ect. Frogs can be found on every continent except Antarctica. They are referred to as the “the true frogs” because of their generalized body form and life history: the so-called generic frog. Members of this family include the bullfrog, common frog, green frog, marsh frog, pickerel and wood frog. True Toads can be found worldwide except in Australasia, Polar Regions, Madagascar, and Polynesia though Bufo Marinus has been artificially introduced into Australia and some pacific island. Besides Bufo, the family includes twenty five genera, all of which, like the frog are anural. Most of the enemies of frogs and toads are fish, turtles, snakes, birds and some carnivore mammals like shrews, minks and raccoons, frogs jump far to try and escape a predator, but a toad cannot jump as fast as a frog. So a toad defends himself by producing toxic or unpleasant tasting skin secretions, which are released when an animal is, seize, because of their bad flavor, toads are not a popular food among predators, even their eggs and tadpoles are toxic. Frogs and toads have voices and make a sound, Both a male toad and frog produces his call by a rapid back-and-forth movement of air over his vocal cords, both toad and frog will close its mouth and nasal opening and force air from its lungs into the mouth, then force the air back over the vocal chords into the lungs To sum up, frogs and toads do seem similar but they have several different qualities regarding shape, size, color, and texture. So it is crystal clear how that people mistake while figuring out the difference between a frog and toad. It is needed that one should learn how a frog differs from a toad
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