Why Do Flies Come Out at Night?
WouterOne of the most common questions we get asked is “why do flies come out at night?” The answer varies depending on the species, but flies don’t usually come out at night. Instead, they lay their eggs somewhere in your house and then wait until the daytime to hatch them. Then they’ll quickly hatch without you ever knowing. Fortunately, they’re not too hard to get rid of.
Flies are most active during the day, but they also rest during the night. They’re most active during the day when the temperature is between 80 and 90 degrees Fahrenheit. When it gets cooler, their activity decreases and they’ll rest. You’ll see fewer flies in the evening when the temperatures drop below 45 degrees Fahrenheit and the sun is down.
Flies sleep at night for several reasons. First, they need to conserve energy. They spend the day buzzing with their friends, but when nighttime comes, they get tired and need to rest. So, they’ll look for a shady place to sleep before the sun sets. They prefer under the leaves of tall grass and under rocks. This gives them a nice place to sleep while they recover from the day. Second, they don’t want to be disturbed by birds or frogs.
However, flies don’t always come out at night. The nymphs of some species may spend the winter under the ice of a water body, where they’ll feed on water until the weather is warm enough to hatch them into full-grown flies. This process is called diapause. Fly metabolism slows down dramatically during colder months. During this period, flies may not find enough food for themselves, which means they may enter a state of hibernation.
