The
Calliphoridae (commonly known as
blow flies,
blow-flies,
carrion flies,
bluebottles,
greenbottles, or
cluster flies) are a family of insects in the order Diptera, with 1,100 known species. The maggot larvae, often used as fishing bait, are known as
gentles. The family is known to be polyphyletic, but much remains disputed regarding proper treatment of the constituent taxa, some of which are occasionally accorded family status (e.g., Beng
(Wikipedia)