Just some of my favorite take-aways from this fascinating book - full of intriguing information about wasps and some really creepy new information. The zombification wasps?! Holy nature.
"In stark contrast to bees, wasps are depicted as the gangsters of the insect world; winged thugs; inspiration for horror movies; the ‘sting’ in the tale of thriller novels; conduits of biblical punishment. Shakespeare, Pope Francis, Aristotle, even Darwin struggled to speak favourably of wasps, and questioned the purpose of their existence. Scientists have been victims of this culture too, shunning wasps as research subjects despite the endless forms of these creatures that remain to be studied. It seems the root of this hatred is the wasp’s sting,* its eagerness to keep on stinging,* and its apparent pointlessness in the natural world."
Part One: The Problem with Wasps
"One hundred and twenty-four million years ago, all the bees were wasps. Then one day a wasp forgot how to hunt and developed a taste for pollen, and bees were born. Some of them even evolved special saddlebags on their back legs which helped them carry pollen back to their nests. Bees have become guardians of global ecosystems as pollinators, and a privileged few are honoured friends of humans as providers of honey, wax and other useful products, but the truth is that in evolutionary terms, there is nothing especially unique about bees: they are simply a specialised, vegetarian version of the largest group of wasps–the crabronids."
"Wasps are old. Wasps are varied, bizarre and beautiful. There are probably more species of them on this planet than any other insect (or animals, for that matter). Without wasps, we would have no ants or bees. Their evolutionary history is more mysterious and tantalising than a grandmother’s button box to a small child."
"The more we intrude on nature, the angrier we get with it for bothering us. Nature is an unwanted house guest, a flaw in our perfect gardens, an uprooter of our concrete deserts. We are so busy complaining about how nature disrupts our sterile order that we miss most of the beauty that is under our noses. Perhaps this is why most people today recognise wasps as only the social wasps–those picnic-botherers, loft loiterers, ‘murder hornets’–for it is these particular wasps that we notice when they cross our paths. It’s an awful shame that we don’t take more care to notice the 32,000 other species of hunting wasps–the solitary ones–which comprise 97 per cent of all the world’s stinging wasp species."
"Not all solitary wasps completely paralyse their prey. Perhaps the most famous example of this is the zombification of the American cockroach Periplaneta americana by the Emerald jewel wasp, Ampulex compressa. Several times smaller than its prey, the wasp can’t carry, or even drag, the victim to her burrow. Instead, she has evolved a clever way of manipulating the cockroach such that it will walk itself to its own underground tomb. She delivers just two stings. The first is a rather crude stab at the thorax, designed to disable the prey by temporarily paralysing its front legs. With the cockroach immobilised, the second, more toxic sting can be administered directly into its brain, and the behaviour-changing zombifying magic starts to work. A neurotoxic cocktail blocks the receptors of the neurotransmitter involved in complex movements like walking, which transforms the roach into a zombie slave who can just about walk but cannot resist the commands of its mistress. Using its antennae as a leash, the mistress wasp leads the roach like a well-trained poodle to an underground nursery for baby wasps. The chemical cocktail of the jewel wasp’s venom is among the most remarkable of all the venoms of hunting wasps, a delicate balancing act rendering the prey helpless enough to be led to its own tomb yet alive enough to remain fresh and juicy for the baby wasps to consume, organ by organ."
"Less is known about how hunting wasps, like Ammophila, use chemicals to locate quarry. But it is likely that they use kairomones too as they would have inherited the same chemosensory machinery from the common ancestor they shared with parasitoids. One such example comes from the tiphiid wasps, which hunt scarab beetle larvae feeding on grasses. These wasps can detect the chemicals that the grass releases when it is being eaten by the larvae. In fact, these wasps are so effective at hunting beetles that they have been used as biocontrol agents to control invasive populations of beetles like the Japanese Popillia japonica and oriental Anomala orientalis, which are major pests of turfgrass."