Heterodon platirhinos, a.k.a. the eastern hog-nosed snake, a harmless colubrid found in the United States
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Agkistrodon contortrix contortrix, a.k.a. the southern copperhead, a venomous pitviper found in the United States
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Agkistrodon contortrix mokasen, a.k.a. the northern copperhead, a venomous pitviper found in the United States
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