not a single or special taxonomic group for venomous snakes. Venom is known in several families. This has been interpreted to mean venom in snakes originated more than once as the result of convergent evolution. Around a quarter of all snake species are identified as being venomous.

Terminology

Venomous snakes are often said to be poisonous, but poison and venom are not synonymous. Poisons must be ingested,

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