Check the head shape: many venomous snakes have a broad, triangular head, but this is not always reliable
Look for heat-sensing pits between the eyes and nostrils: pit vipers have these
Observe the pupils: some venomous snakes have vertical, cat-like pupils, but not all
Notice the tail: rattlesnakes have a rattle at the end of the tail
Look at the body pattern: some venomous species have distinctive markings, but patterns vary widely
Check the scales above the eyes: some venomous snakes have prominent brow ridges
Compare the body and neck: venomous snakes often have a thicker body and narrower neck, but not always
Identify the species using a local field guide or trusted wildlife source
Assume any unknown snake may be venomous and keep a safe distance
Do not rely on color alone to determine whether a snake is venomous
Do not handle or try to catch the snake
Contact local animal control or wildlife professionals if needed