The fer-de-lance (Bothrops asper) is widely considered the most dangerous snake in the Americas, responsible for 50–80% of all snakebites in Central and northern South America. Its venom is hemotoxic, causing severe tissue necrosis, internal bleeding, and potential organ failure; while untreated mortality was historically 10%, modern antivenom has reduced fatality rates to less than 1%.
However, survivors frequently suffer gangrene and amputation due to the venom's tissue-destroying effects.
Geographically, this pit viper is found from southern Mexico to northern South America, including countries like Costa Rica, Panama, Colombia, and Venezuela.
It thrives in tropical rainforests, plantations, and areas near human habitation, often hiding in leaf litter or undergrowth where it can easily encounter people. Its aggressive defensive nature and proximity to human settlements make it particularly lethal compared to other venomous species.
