Myrmecia, often called bull ants or jack-jumpers, are well-known in Australia for their aggressive behavior and powerful stings. The venom of these ants has approximately a 3% chance to induce anaphylactic shock in their sting victims. Until the introduction of a vaccine the stings could, if gone untreated for only a matter of hours, be lethal. These large, alert ants have characteristic large eyes and long, slender mandibles and they have superior vision, able to track and even follow, intruders from a distance of 1 meter.
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