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. 2022 Jan 7;376:e057926. doi: 10.1136/bmj-2020-057926

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Fig 1 — Difference in fangs between elapids and viperids. A) Elapids have short, fixed, front fangs. B&C) Vipers have much longer and retractable front fangs. (Photos courtesy of Ahmad Khaldun Ismail)