: a tropical American pit viper (Lachesis mutus) that is the largest New World venomous snake—called also surucucu
Species (Lachesis muta) of pit viper, found in scrublands and forests from Costa Rica south to the Amazon River basin. It is normally about 6 ft (1.8 m) long but reportedly may grow to twice this length. It is pinkish or tan, marked with large, dark, diamond-shaped blotches. Though seldom encountered, the bushmaster is potentially lethal.