Viperidae - Wikipedia
https://en.wikipedia.org/wiki/Viperidae
WEBThe Viperidae ( vipers) are a family of snakes found in most parts of the world, except for Antarctica, Australia, [2] Hawaii, Madagascar, New Zealand, Ireland, and various other isolated islands. They are venomous and have long (relative to non-vipers), hinged fangs that permit deep penetration and injection of their venom. [3] .
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