If you've been out in the Laurentians or the Eastern Townships lately, you may have noticed there've been a lot of flies - notably bigger varieties known as flesh flies.
They have been seen invading those communities to the point where some restaurants had to shut down their terrasses and residents can't enjoy their backyards.
"Flesh fly - the name is a little bit scary," said Stephanie Boucher, curator of the Lyman Entomological Museum and Research Laboratory at McGill University.
"They are just a little bit bigger than the normal housefly. They have red eyes, stripes on their thorax and they have a checkered abdomen."
Some species of flesh flies usually flock to dead bodies and help in the decomposition; others help in pollination. But Boucher said the ones we're seeing are linked to last year's infestation of forest tent caterpillars, creating a virtual feast for the flesh flies which normally help control the population of caterpillars, known to damage trees.
"Now they're just a population explosion," said Boucher.
"They're quite annoying but they're not dangerous - they don't transmit any disease."
So they're not after your food or garbage.
"They're really looking for caterpillars and cocoons to lay their eggs," said Boucher.
And luckily they're not around for long.
"Most of the time, they need these caterpillars to finish their lifecycle," said Boucher.
"Once they can actually find their host, the female will lay their eggs - they will reproduce, lay their eggs and after that, they die quite shortly after."