Lightest egg laid by a wasp

The lightest eggs laid by a wasp are those of Caraphractus cinctus, a tiny species of parasitic chalcid wasp known as a fairyfly. Each egg weighs a mere 0.0002 mg, which means that it would take 141,750,000 of these eggs together to weigh just a single ounce. It is an aquatic freshwater species, widely distributed through Europe, parasitising the eggs of water beetles and using its wings as paddles to swim around. Fairyflies (also called fairy wasps) parasitise the eggs of other insects, laying their eggs inside host eggs by using their ovipositor (egg-laying tube) to pierce the host eggs. When the wasp's eggs hatch inside the host eggs, the emergent wasp larvae duly feast upon the embryos of the host eggs.