What is a "gall wasp"?

A gall wasp is a type of small insect that belongs to the family Cynipidae, known for its ability to induce the growth of abnormal plant tissue called galls. The female gall wasp lays eggs on plant stems or leaves, and when the larvae hatch, they stimulate the plant to form galls around them for protection and nourishment. These galls serve as a habitat and food source for the developing wasp larvae. Gall wasps can affect a wide range of plant species and have complex life cycles that involve alternating between different host plants.