Myrmecia (ant) encountered before. Based on five species, the median lethal dose (LD) is 0.18–0.35 mg/kg, making it among the most toxic venoms in the insect world. The toxicity of the venom may have evolved due to the intense predation by animals and birds during the day, since "Myrmecia" is primarily diurnal. In Tasmania, 2–3% of the human population is allergic to "M. pilosula" venom. In comparison, only 1.6% people are allergic to the venom of the western honeybee ("Apis mellifera"), and 0.6% to the venom of the European wasp ("Vespula germanica"). In a 2011 Australian ant-venom allergy study, the objective of
Myrmecia (ant) which was to determine what native Australian ants were associated with ant sting anaphylaxis, 265 of the 376 participants in the study reacted to the sting of several "Myrmecia" species. Of these, the majority of patients (176) reacted to "M. pilosula" venom and to those of several other species. In Perth, "M. gratiosa" was responsible for most cases of anaphylaxis due to ant stings, while "M nigriscapa" and "M. ludlowi" were responsible for two cases. The green-head ant ("Rhytidoponera metallica") was the only ant other than "Myrmecia" species to cause anaphylaxis in patients. Dogs are also at risk of death