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Eyelash Viper
Eyelash vipers are the kind of snakes that will actually camp out in a specific spot and wait for prey to wander by before they strike. The interesting thing about these particular snakes is that they will return to the same ambush spot yearly, just in time to catch birds migrating in the spring. There is even a belief among South American villagers that this snake will give you a little wink before it strikes.