The flies in this case were greenbottle flies, they are not normally the sort of fly that you would find indoors, they are only attracted indoors because of the presence of a carcass or a corpse.

• 本案中的苍蝇是叉叶绿蝇，并不是在室内很常见的苍蝇种类。只有当室内有尸体时，它们才会被吸引到室内。