I Thought It Was Rice on My Garbage Can—Then I Saw It Moving

You step outside to take out the trash and notice something strange: hundreds of tiny white specks covering the lid of your garbage can. At first, they look like scattered grains of rice. Then you lean closer—and realize they are moving.

It is an unpleasant surprise, but there is a surprisingly simple explanation.

Those tiny moving specks could be maggots, the larval stage of flies. Although the sight can be unsettling, these larvae commonly appear around household garbage when flies find a suitable place to lay their eggs.

So why would they suddenly appear on top of a garbage can?

The answer often begins with what is inside.

Food scraps, meat leftovers, fruit peels, and other decomposing organic materials release odors that attract adult flies. When flies gain access to a garbage bag or container, they may lay eggs near the food source. Under favorable conditions, those eggs can hatch into larvae in a relatively short time.

Warm weather can speed up the process, which is why these infestations are particularly common during summer.

But there is another detail that surprises many homeowners: the larvae may not have hatched where you see them.

As maggots develop, they feed on decaying organic material. When they are ready to move to the next stage of their life cycle, some crawl away from the moist food source and search for a drier, more sheltered place to pupate.