You usually cannot tell for sure by appearance alone
Assume any unknown snake may be venomous
Check local species guides for your area
Look for a triangular...
Jackie is typically the lighter-colored one
Shadow is typically the darker-colored one
Jackie may have a more visible face pattern
Shadow may have a more solid or...
Thick, heavy-bodied snake
Dark coloration, often brown, olive, or black
Distinctive broad, triangular head
Narrow neck behind the head
Vertical, cat-like pupils
Heat-sensing pits between the eyes and nostrils
Often...
