Today’s Venomous Yet Truly Morbid Fact!
In the last few years, during dry summers, public health officials in Tokyo have warned citizens that the world’s largest and most painful hornet may be in their midst. The so-called Asian giant hornet, known locally as yak-killer, delivers a venomous sting that contains high levels of the pain-inducing compounds normally found in bee or wasp stings, along with a deadly neurotoxin called mandaratoxin that can be fatal. The world’s leading expert in the giant hornet, Masato Ono, described the sting as feeling like “a hot nail through my leg.” Worst of all, the sting attracts other hornets to the victim through the pheromones it leaves behind, increasing the likelihood of being stung several times.
In Japan these hornets are called suzumebachi, which translates to “sparrow wasp.” They are so large, measuring five centimeters from head to tail, that when they fly they actually resemble small birds. During hot summers they can be seen in Japanese cities foraging in garbage cans for bits of discarded fish to carry back to their young. Because they are so willing to venture into urban areas in search of food, about forty people die every year after being stung by the massive hornets.
Culled from: Wicked Bugs: The Louse That Conquered Napoleon’s Army & Other Diabolical Insects
And here’s what the stings look like. Yikes!


Interesting fact: Japanese giant hornets often raid honey bee colonies. Just a handful of hornets can decimate a hive of tens of thousands. European bees have no natural defence against the giant hornets. Asian bees, however, have developed a fascinating countermeasure. When a giant hornet enters a hive, Asian bees swarm the invader and encase it in a “bee coat”. The hornet’s internal temperature rises to fatal levels, and the hornet dies of something like heat stroke. The bees then eject its hull from the hive.
First read about this in Jerry Coyne’s essential book, Why Evolution Is True.
Link to YouTube clip from a National Geographic documentary: https://youtu.be/2P7Q1ncgcoY
Mike