Use lids or covers on drinks outdoors. It’s not about eggs—it’s about flies drowning and then you fishing them out with a spoon. Not a good look.
Eliminate standing water around your home for mosquito control. Dump out kiddie pools, change pet water bowls daily, and fix that leaky hose. Your neighbors will thank you, and so will your ankles.
Keep your trash cans sealed tight. Flies are persistent, but they’re also lazy. If the garbage is locked up, they’ll go bother someone else’s picnic.
The “Eggs in Water” Secret No One Talks About
There is one fly that lays eggs in water: the caddisfly. But don’t panic—it’s not buzzing around your kitchen. It’s an aquatic insect that looks like a moth, and its larvae build little houses from pebbles. Weirdly artistic.
Fly Life Cycle | Stages of Fly Development
Also, some parasitoid wasps (not true flies, but still) lay eggs in aquatic moth larvae. But that’s getting into nature-documentary territory, and we have a vibe to keep light.
So unless you’re camping near a slow-moving stream with a magnifying glass, you’re never going to see a housefly egg in water. Ever. Science says so.