Cottonmouth snake (Agkistrodon piscivorus), a species of venomous pit viper found in SE United States. Aransas National Wildlife Refuge, Texas, USA.

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Keywords: agkistrodon, america, american, aransas, cottonmouth, moccasin, national, nature, piscivorus, pit, refuge, snake, states, texas, travel, united, usa, venomous, viper, water, wildlife