Black adder

Black adder may refer to either of two classifications of snake:


 * Vipera berus, a viper species found in Europe and Asia
 * Eastern hognose snake, a basically non-venomous snake found in the United States

Or the British TV series:
 * The Black Adder, first series of the sitcom Blackadder
 * "The Black Adder" (pilot episode), the unaired pilot episode of the series