Eli5: Where do insects go when temperatures drop below -25C in the winter and isn’t the soil frozen for them to go under?
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There are multiple strategies used by various insects… I can’t remember them all, but here’s what I remember
1. Some just flat out don’t survive
2. Some find sheltered areas that don’t get as cold, and survive in them
3. Some are underground beforehand, I think 10cm underground is like moving 100km towards the equator in terms of the temperature
4. Some are able to survive limited freezing
5. Others are able to survive complete freezing
The strategy used is generally dependent on the origins of the insect, a mosquito from tropical regions would fit in number 1 while an insect from northern regions that doesn’t have a burrowing phase could be a number 4 or 5
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