|
The "trianglular shaped head" theory, taught to kids in America commonly, mostly applies to North American Crotalinae, (Rattlesnakes, cottonmouths, and copperheads.) They account for most envenomations in the U.S. The coral snakes are the only other venomous snake in the U.S., and there are far less bites, and less chance of envenomation if you are bitten. There are many species of nonvenomous snakes that do have a similar shaped head. Long story short, no, around the world, you would have to know the species. Boomslangs, australian brown snakes, & cobras cause allot of deaths, and do not have a triangular shaped head.
| 
