Swat Black

What are those little wormy things that come out of a dead house fly?

my brother recently swatted a black house fly then we were looking at it’s big eyes then i noticed this little worm thing come out of the body. and then like two minutes later, a whole bunch just squirm out and they’re all moving! they look sick, WHAT ARE THEY???

If the fly had been dead for a day or so, they are likely maggots, the larval stage of the fly lifecycle just past the egg. If the fly was just swatted, it might be parasites infesting the fly. The reference lists some candidates.

NHS Star Wars Lego SWAT – Black Ops