I can be sitting outside without a fly in sight and the second I open a drink or food there is a swarm. How the heck to they find good sources so quickly?
In: Earth Science
Flies have olfactory hairs covering their bodies. They can smell better than we can. So once you open food packaging, you create a plume of molecules that you can’t sense for being too dilute, but the flies can. And the further that plume expands outward, the more flies in the area can smell it and go looking for it. There may not be any flies in sight, but that merely means you can’t see them, that doesn’t mean they aren’t there.
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