Bugs don't just do a disappearing act in the winter:some can tolerateextremely harsh, cold conditions. One of their most common winter survival strategies, called diapause, allows mosquitoes and black ants to slow down their metabolism when it gets coldtemporarily freezing their development.Some caterpillars burrow under leaves and become frozen icicles, thawing out in the spring.Those who aren't winter warriors hunker down and rely on theirfellow bugs (or humans) for seasonal warmth, or fly to warmer spots.It's not like bugs can just turn on the heater, zip up a fluffy parka, ortuck in to a warm cup of cocoa to stay warm in the winter. The truth is that bugs have many different ways to make it through the winter alive.Some simplyfly to warmer spots. Others burrow into logs, hiding away in insulated nooks with hundreds of their friends to wait for warmer days.But one of the most common ways that bugs have figured out how to last through the harsh winter cold turns out to also be one of the insect world's most awesome secrets: bug hibernation.How do bugs hibernate'Bugs hibernate in a couple of different waysincluding one that is straight out of science fiction. Diapause is the name for the wayinsectslike mosquitoes and black ants slow down their metabolism when they sense that days are getting shorter, food is getting scarcer, and temperatures are dropping. The move freezes their development (and their bodies too) as they wait for warmer days to arrive again. That's when they'll thaw out andbuzz away.Professor Brent Sinclair, who directs the Insect Low Temperature Biology Lab at the University of Western Ontario, toldBusiness Insider that bugs in this state of suspended animation "dont do anything." Hesaid the processes at work in the insects when they move into diapause are a lot like theinsulin signaling that humans do to regulate sugar levels, but it's still not clear what prompts the bugs to shut their metabolism down in the fall, and how they know to re-start it again each spring."They dont develop. They just sit under the bark of trees where theyve been feeding all summer, Sinclair said.Quiescence is a similar bug-freeze move that often happens right after diapause. In this phase, the bugs are a bit more active than in diapause, because they can still respond to stimuli in the environment as they await their next meal in the spring. Different species of mosquitoes exercise both diapause and quiescence they go dormant either as eggs, larvae, or adults,andwait for the next biting season to come back around.Diapause is like a literal "chill pill" for bugs.Some use the ground as a blanket, others sink to the muddy bottoms of pondsThere are other ways to outlast the cold without leaving town. Insects that live in the water wait out chilly days at the bottoms of ponds, Sinclair said, while other bugs burrow into the soil, using the ground like a warm blanket to shield them from the iceabove. Periodical Cicadas (Magicicada) do this dirt trick in the extreme: They're famous for their 13 and 17 year stints underground, after which they emerge for only a few weeks in the summer just long enough to lay eggs. Those new eggs won'twinter aboveground either. After six to 10 weeks they hatch and drop to the ground, where they burrow in to begin their own 13 or 17 year underground residency.Ants burrow too. Theycan move deep into their underground nests andclose up the exit with soil and leaves, making a shelter designed to keep out the cold.Other bugshuddle together to keep cozy. Honeybees cluster in a big ball and divide up their warming chores; Bees at the core of the group move their wings to keep everyone warm, while outer bees act like insulation, staying very still. Ladybugs daintily burrow into cracks in trees, or crawlinto warm pockets like other small beetles, huddling together to stay warm. In general, they try tocome in from the cold, and sometimesfind their way intohouses or barns forwinter shelter.A few freaks of nature can stand the coldAs a general rule, most bugs won'tbe active at temperaturesthat dip below40 degrees Farenheit."Insects and other invertebrates just don't have the same metabolic requirements as we do,"said professorMarlene Zuk, a behavioral ecologist who studies crickets at the University of Minnesota. Shesaid while some bugsexhibit superpower-style climate defenses, it's important to remember that most of them don't love the cold.But some treat the coming of winter as a time for a kind of tune-up,andscrap the water in their body for their own special brands of bug anti-freezethat help them withstand the seasonal chill. Thesecryoprotectant chemicalsare used by mourning cloak butterflies and emerald ash borers, too. Woolly bear caterpillars just tough it outall wintertheir entire body freezes and comes back to life when it's warm again. "Ice forms inside their bodiesyou tap them and theyre solid," Sinclair explains. "It's an amazing trick." They can survive at temperatures well below anything found on Earth.Mostinsects must employ at least one of these strategies to make it until the spring thaw, but not everybody shies away from the snow.Snow fleas, for example,party on the powder all winter long. They're just one more example of how bugs, like people, get through winter in all kinds of weird and unimaginable ways.Lauren Friedman wroteaprevious version of this post.SEE ALSO:Some people have a strong urge to snack in the winter ' but you probably won't gain as much weight as you thinkJoin the conversation about this storyNOW WATCH: We went to the NYC restaurant that serves grasshoppers and they're delicious
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