Recognizing dangerous snakes in the United States and Canada: a novel 3-step identification method.

@article{Cardwell2011RecognizingDS,
  title={Recognizing dangerous snakes in the United States and Canada: a novel 3-step identification method.},
  author={Michael D Cardwell},
  journal={Wilderness & environmental medicine},
  year={2011},
  volume={22 4},
  pages={304-8}
}
The rapid and accurate recognition of dangerously venomous snakes following bites is crucial to making appropriate decisions regarding first aid, evacuation, and treatment. Past recommendations for identification of dangerous North American pit vipers have often required subjective determinations of head shape or relied on traits shared with some nondangerous species (elliptical pupils and undivided subcaudal scales). Heat-sensitive facial pits are diagnostic but require close examination of… CONTINUE READING

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