Venom lethality and diet: Differential responses of natural prey and model organisms to the venom of the saw-scaled vipers (Echis)

► Locusts used to generate LD50 and time to death values for four Echis venoms. ► These values are compared with those collected for Scorpions by Barlow et al., 2009. ► Arthropod feeding Echis venoms are more potent to locusts than vertebrate feeders. ► Major differences between LD50 and time to death values between test arthropods. ► Convenient model species are not suitable for evolutionary toxinological studies.