Cynipid wasps are small insects belonging to the family Cynipidae. They are known for their unique ability to induce galls, which are abnormal growths on plants, particularly on oak trees. These galls provide a protective environment for the wasp larvae to develop. There are over 1,000 species of cynipid wasps, each with specific host plants. The life cycle of these wasps typically involves a female laying eggs inside plant tissue, leading to gall formation. The galls can vary in size and shape, depending on the species and the host plant's response.