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Browse three reviewed snakes at a time. Changing pages does not reload or move you away from the myths below.
Oxybelis aeneus
Potentially venomous
Oxybelis aeneus is a slender, long-bodied arboreal colubrid commonly called the Mexican vine snake (also Thornscrub Brown Vinesnake). It occurs in dry scrub and open woodland where it hunts small vertebrates. It is mildly venomous to prey but not considered dangerous to humans; bites are uncommon and may cause localized pain or swelling. Treat any bite promptly and seek medical care.
Nerodia cyclopion
No medically significant venom known
A nonvenomous, semi-aquatic natricine snake native to the lower Mississippi River valley and adjacent Gulf Coastal Plain. Often found near slow-moving water and wetlands; feeds mainly on fish and amphibians. Tends to be defensive when threatened (flattening body, striking, releasing musk and feces). Not considered dangerous to humans but should not be handled.
Crotalus scutulatus
Venomous
Crotalus scutulatus — Mohave rattlesnake — is a venomous pit viper native to arid and semi‑arid regions of the southwestern United States and northern Mexico. It is known for a neurotoxic component in some populations’ venom (the “Mojave toxin”), variable coloration and banding, and a prominent rattle. Occupies desert flats, scrub, rocky slopes, and washes; avoids dense forest and high alpine areas.
Juvenile venomous snakes can deliver medically significant bites, but the common claim that they are automatically more dangerous because they cannot control venom delivery is not supported as a general rule. Adult snakes usually have larger venom glands and can deliver a larger total amount.
Bottom line: Treat every suspected venomous snakebite as a medical emergency, regardless of the snake’s age.
Head shape alone is unreliable. Many nonvenomous snakes flatten or widen the head defensively, and viewing angle can change the apparent shape.
Bottom line: Do not approach a snake to inspect its head. Use multiple traits, location, and a safe-distance photograph.
Tourniquets can worsen tissue injury and are not recommended for typical United States snakebites. Emergency evaluation is more important.
Bottom line: Call 911 or Poison Control at 1-800-222-1222. Keep the person calm and do not cut, suck, ice, or tourniquet the bite.
Young copperheads can have a contrasting yellow or greenish tail tip used in caudal luring. It is soft and tapered, not a segmented rattle. The bright color usually fades with age.
Bottom line: Never move closer to inspect the tail. The feature is a clue, not permission to approach or handle the snake.
Several non-rattlesnake species vibrate their tails when threatened. Dry leaves can make the sound resemble a rattle.
Bottom line: A defensive tail vibration does not identify the species. Keep your distance.