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Musca domestica are the first to arrive on a corpse; a female can lay up to 150 eggs.

Their life cycle makes it possible to determine the post-mortem interval, considering the time it takes them to move from one stage to another.

Muscid flies will visit a body soon after death, attracted by any exudates rather than the corpse itself, It is characterized by four narrow black stripes along its thorax and a greyish or yellowish abdomen.

Calliphora vomitoria females lay their eggs on the corpse; but also in open wounds, their cycle lasts about 2 to 3 weeks (depending on weather conditions) and they have a great devouring capacity in the process of decomposition.

The larvae of these diptera destroy superficial tissues, creating the first cavities that act as entrance doors for other species to reach deeper areas