Collett's snake (Pseudechis colletti ), also commonly known as Collett's black snake, Collett's cobra, or Down's tiger snake, is a species of venomous snake in the family Elapidae. The species is native to Australia. Although Collett's snake is not as venomous as other Australian snakes, it is capable of delivering a fatal bite, ranking nineteenth in the world's most venomous snakes.