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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: Saharan Uromastyx (Uromastyx geryi), adult male
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Carl Koch: PA090206
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Carl Koch: PA090204
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Carl Koch: PA090198
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Carl Koch: PA090191
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Carl Koch: PA090182
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Juvenile Northern Ribbon Snake, SE Wisconsin
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Carl Koch: Prairie Violet, WI
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Carl Koch: Shooting Star, WI
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Carl Koch: Pretty Green Frog, SE WI
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Carl Koch: Wood Anemone, SE WI
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Carl Koch: Grey treefrog (Hyla chrysoscelis or Hyla versicolor), SE Wisconsin
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Carl Koch: Common Snapping turtle (Chelydra serpentina), SE Wisconsin
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Carl Koch: Eastern Hog-nosed snake (Heterodon platirhinos)