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
Yellow crazy ant were also more aggressive toward other ant species and explored their environments more. This is believed to show why the ants decline when deprived access to scale insects in the field, and confirm reduced honey dew will greatly reduce the ants ability to form super colonies. While controlling the yellow lac scale insect is expected to control the yellow crazy ant on Christmas Island, on mainland Australia it is thought this would not help. There are at least a dozen honey dew producing insects as well as extrafloral nectar from native acacia trees all of which fuel yellow crazy ants.