: an act of showing someone how something is used or done : demonstration. 1  I saw a demo on how to use the computer program. 2  The salesman gave us a demo of the vacuum cleaner, and it seemed to work very well. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples 3
If however, you are talking about some maggots in a bowl of wet food (either canned food or dry food which got wet or which you deliberately added fluid to) it is a different matter. Maggots come from flies eggs and they take some set period of time to hatch from the eggs.
The maggots of apple or railroad flies are considered a pest species, as these flies ruin apple crops by laying their eggs directly into the apples. Maggots are typically tubular with no discernible body parts. The rat-tailed maggot, however, is an aquatic maggot that usually lives in toilets and has a long tail that is used as a breathing tube. Some maggots can also be used medicinally, as certain species, such as the bluebottle larvae, eat away at dead, rotting flesh and promote healing.