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Vertebrates (Amphibians reptiles-amphibians-icons-set-cartoon-260nw…
Vertebrates
Amphibians 
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Frogs, Salamanders, Toads
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At a certain size, the young develop limbs and lungs.
Amphibians are the first to die off when their habitats are disturbed or contaminated with chemicals
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Fish
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There are over 30,000 species of fish
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Catfish have over 27,000 taste buds, where humans have only 9,000.
They are covered in scales which are often covered in a layer of slime to help their movement through water.
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Fish are prey for snakes, eagles, pelicans, otters and seals
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Mammals
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4,500-5,500 species of mammals.
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Reptiles
Snakes
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Some snakes have more than 1,000 bones in there body.
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Crocodilians
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Crocodiles
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They eat fishes,frogs,birds, and etc.
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Aligators
Lizards
There are over 4,000 different species on earth
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