蝇类通常在人或动物死后在其尸体上产卵,进而孵化成蝇蛆,蝇蛆的生长有大致的规律可循,因而可以作为死亡时间推断的主要手段之一。但在一些情况下,活体上也可以生蛆,当这些已经生蛆的活体死亡,运用蝇蛆推断死亡时间,若未考虑其在活体存活 Flies generally lay eggs on their bodies after the death of a human or animal, and hatch into maggots. The development of maggots has a general rule that can be used as one of the main means of inferring the time of death. However, in some cases, maggots can be born in vivo. When the live maggots have died, the maggot is used to infer the time of death, if it is not considered alive