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amphibia 
Archegosaurus, Extinct Tetrapod Amphibian
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Mastodonsaurus, Extinct Tetrapod Amphibian
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Mastodonsaurus prehistoric amphibian, illustration
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Frog skin, light micrograph
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Frog intestine, light micrograph
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Frog liver, light micrograph
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Male & Female Green Frog
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American Toad
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Gray Tree Frog Calling
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Green Frog
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Red-eyed treefrog
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Red-eyed treefrog
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Masked frog
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Red-eyed treefrog
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Red blood cells of a common frog, light micrograph
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Common frog testis, light micrograph
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Spraying wheat to control willowweed
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Loreto Leaf Frog (Noblella myrmecoides)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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Vaillanti's Monkey Frog (Phyllomedusa vaillanti)
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