The Family Tachinidae is a huge family of insects that are commonly known as tachinid flies. These flies are known for laying their eggs on other insects, which then hatch and consume the host. There are a few different synonyms for the Family Tachinidae, including the Tachinid Flies, the Parasitic Flies, the Brachyceran Flies, and the Calyptrate Flies. Despite their somewhat gruesome reproductive habits, these flies are actually quite beneficial to the environment. They help to control pest populations by keeping insect populations in check, and they also serve as an important food source for other animals.