Poisonous snakes are present in New York state. Although there are many biting snakes, only 3 of the 16 native species carry venom that pose a danger to human life. We nevertheless were a little wary when we saw this little creature slithering about our deck.
Is it poisonous? Supposedly, poisonous snakes have vertical pupils which this did not have. Actually, it was only a common garter snake (Thamnophis sirtalis). Characteristically docile, its bite could nonetheless cause swelling and rash in humans, a reason to stay clear of its way.
Ref: Snakes of New York State
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