Dangerous biter is a term used to describe three species of venomous snakes: the COPPERHEAD (10 letters), ADDER (5 letters) and TSETSE (6 letters). The COPPERHEAD is a pit viper native to North America, while the ADDER is a venomous snake found in Europe, Asia and Africa. The TSETSE is a large fly found in Africa that carries a deadly disease called sleeping sickness. All three of these creatures are considered dangerous biters due to their venomous bites.