In snakebite identification, the mnemonic red on black indicates which of the following?

• A. Venomous
• B. Non-venomous
• C. No venom effect
• D. Venom from neurotoxin only

Answer: (B)

In the field, a simple color-pattern rule helps judge the likelihood of venom. Red on black indicates a non-venomous snake in many North American guides. The logic is that venomous coral snakes have red touching yellow, while non-venomous look-alikes typically have red touching black. So the red-on-black pattern signals a non-venomous bite risk.

Keep in mind this is region-specific and not perfect for all species. Always treat any snakebite as potentially dangerous and seek medical care.

This rule does not indicate venomous, nor no venom effect, nor venom that is neurotoxin-only.