Harlequin snake

• Agkistrodon contortrix mokasen, the northern copperhead, a venomous viper found in the eastern United States
• Micrurus fulvius, the eastern coral snake, a venomous elapid found in the eastern United States
• Micrurus tener, the Texas coral snake, a venomous elapid found in the southern United States and northern/central Mexico