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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 microphthalmus
Potentially venomous
Oxybelis microphthalmus — Thornscrub Brown Vinesnake — is a slender, arboreal colubrid found in thorn-scrub and dry forest habitats. It is mildly opisthoglyphous (rear-fanged) with small venom glands; bites to humans are rare and typically cause localized symptoms. Exercise caution and avoid handling; retreat indoors or contact local wildlife authorities for assistance.
Gyalopion quadrangulare
No medically significant venom known
Small, secretive rear-fanged snake of arid and scrub habitats in the US (southeastern Arizona), Mexico, and rarely reported in adjacent regions. Not considered medically significant to humans but should be treated with caution; avoid handling.
Lichanura trivirgata
No medically significant venom known
Lichanura trivirgata (Three-lined Boa) is a nonvenomous, small to medium-bodied boa found in parts of the southwestern United States and northwestern Mexico. Generally secretive and slow-moving, it inhabits arid and semi-arid habitats and feeds primarily on small mammals, birds, and reptiles. Not considered dangerous to humans but should not be handled; may bite if provoked.
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.