LD 50 ratings are but one factor.....as far as cobras go the king cobra aint particularly toxic but give the snake is so damn big it also has volume......my local prairie rattlers are more toxic than an eastern diamondback but the eastern diamond back is more likely to kill you cause its a bigger snake.....
the reason timbers and canebreaks tend to kill more ppl than say a mohave is cause more ppl live where they live and have much larger ranges.....its a numbers game, more ppl come into contact with timbers....
you pretty well covered it on the tiger ratter, and mohave....the rating is based on who did the study and where the venom was injected into the animal....venom into an artery kills alot faster and takes less than the same venom into muscle or delivered just under the skin....they are just other species of rattlers.....general rule is the farther south you go in the Americas the more likely the rattler you run into will have neurotoxic venom....rattlers of Central and South America generally run to the neurotoxic end of the spectrum and not so much on the muscle destroying end like most US rattlers and copperheads and cottonmouths....
Last edited by rattler; 10/25/10.
