Most people are completely unaware of the existence of the Paraguayan Venomous Duck. Belonging to the genus Dendrocygna, its full scientific name is Dendrocygna peligrosa. Very few people have seen the Paraguayan Venomous Duck in the wild, though it is well known to the indigenous peoples of the Paraguayan rainforest who use its venom to coat their arrowheads for hunting and warfare.
The venom of the Paraguayan Venomous Duck (PVD) is a neurotoxin which quickly causes its victim to lose control of its muscles, rendering it powerless to defend itself. The PVD then swiftly devours its prey, which includes ducklings of other species, frogs, and, ironically, venomous snakes.
There is no known antivenin for the PVD. It rarely attacks humans, only doing so when startled or threatened. There have been accounts of humans surviving a bite by a PVD, but most victims die within hours.