Dart poison kills by stopping the victims heart. It can kill all kinds of monkeys and apes up to the size of pig-tailed macaques (Macaca nemestrina), which weigh as much as 30 pounds for a mature male. This is a small dusky leaf monkey (Presbytis obscura) that has been killed by blowpiping.
Endicott Image Collection
Blowguns., Batek (Malaysian people) -- Hunting., Lebir River (Malay)