A green lacewing. Isn’t it stunning? The looping cellophane wings, the extravagant antennae, the eyes a pair of shining beads. And that streamlined body–in all the world, could there be a truer green? Imagine taking flight with those diaphanous wings, sailing into darkness with see-through tackle. Maybe, with lives this brief, beauty pre-empts sturdiness.
Adult lacewings are nocturnal and fairly passive; most feed on nectar, pollen and honeydew. At some point during their four-to six-week lives, they find a mate, touch antennae, mingle mouthparts, and finally join abdomens, jerking and vibrating in a vertical position. The female soon lays 100 to 200 eggs on foliage, ideally with plenty of aphids nearby. Each dainty white egg is secured at the end of a filament about a half inch in length. After a few days the eggs hatch, molt, and the emerging larvae climb up the stalks and into the sunshine. Immediately they start feasting on whatever they can find: aphids, mites, caterpillars, other small bugs and eggs. These creatures are so proficient at dispatching aphids that lacewing eggs are shipped to gardeners and farmers for use as biological pest control.
Unlike humans, who are most comely in their youth, lacewing larvae are not what we’d call attractive. Their humpback bodies are swollen in the middle, and tufts of bristles protrude from their sides. These bristles are neither armor nor adornment. They are there to help secure dead victims and other debris to the backs of the larvae. As the gruesome collection grows, it serves as camouflage from birds and other predators, while offering the host cover for hunting.
Lacewing larvae tend to swing their heads from side to side as they search for food, seizing what they find with their strong mandibles and injecting it with paralyzing venom. The hollow jaws then draw out the body’s fluid, after which the corpse is tossed onto the heap of other luckless prey. Occasionally these rapacious predators, also called aphid lions and aphid wolves, will even bite humans. In two or three weeks nature cues them to stop eating and start spinning cocoons, from which adult lacewings appear five days later to repeat the cycle.
Fearsome youth or fragile beauty–makes no difference to the common lacewing, who is always both, forever coming, forever going, a crawler with notions of flight, a flyer with flashbacks of sunshine.