Cecidomyiidae, commonly known as gall midges, are small flies belonging to the family of insects within the order Diptera. They are typically less than 5 mm in length and are known for their unique life cycle, which often involves creating galls on plants. These galls are abnormal growths that provide a habitat and food source for the larvae. Gall midges are found in various habitats worldwide and play a significant role in ecosystems. Some species are considered pests because they can damage crops and ornamental plants. However, they also contribute to biodiversity and serve as food for other organisms in the food web.