Copperhead (Agkistrodon contortrix), Obed Wild & Scenic River, 2015.
Like all pit vipers, the copperhead is generally an ambush predator. Pit vipers prefer to find a promising position and wait for suitable prey to arrive. When hunting insects, however, the adult copperhead actively pursues its prey. Juvenile copperheads even use 'caudal luring', which is using their brightly-colored tail to attract frogs and lizards. Like most viperids, they prefer to avoid humans - and when given the opportunity - will leave the area without causing any harm. NOTE: unlike other viperids, their extremely effective camouflage has (probably) resulted in a slightly-unusual behavior in the copperhead: it will often freeze in place instead of moving away. Do not approach the animal. Unfortunately, most bites occur when people unknowingly step on or move near them.
U.S. National Park Service
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