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Heterodon platirhinos
Adder? Doesn't like photos. Spread his neck started hissing at me.
Go Google "adder" and look up its location, you will find out they are not on this continent :) This is a harmless snake that when startled, spread their neck and hiss. It's all just a bunch of bluffing. This is a species that rarely bites, they are just trying to look more intimidating.