Genus Oestrus is a type of fly that is commonly found in the mammal's family. This fly is known for its ability to lay eggs in the wound of an animal. Synonyms for this term may include Oestridae, botfly, and warble fly. Botfly is a term that is commonly used for the larvae of the Oestrus fly. Similarly, Warble fly is another term that is used to refer to the same type of fly. These synonyms are often used interchangeably and can be used to refer to the same type of insect. The Genus Oestrus is commonly found in North America and Europe and can cause a lot of harm to livestock if left untreated.