Cottonmouth snake (Agkistrodon piscivorus), a venomous pit viper shows aggression. Aransas National Wildlife Refuge, Texas, USA.

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Photo credit: © Gabbro / Alamy / Afripics
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Keywords: aggression, agkistrodon, america, american, aransas, cottonmouth, fangs, moccasin, mouth, national, nature, open, piscivorus, pit, refuge, snake, states, texas, travel, united, usa, venomous, viper, water, wildlife