You know how bugs die in the winter, well what is it that kills them, the cold, their lifespan is just up or is it

Question: You know how bugs die in the winter, well what is it that kills them, the cold, their lifespan is just up or is it something else?
- Keywords:
  death,
  insect,
  lifespan
Asked by 947smap48 to Sheila, Piyush, Natalia, Gary, Dimitar on 3 Nov 2018.
- Gary Munnelly answered on 3 Nov 2018:
  
  This is definitely not my domain of study, but I guess it would depend on the type of bug. Different bugs live in different places and have different life-cycles, so I image the answer to this question changes depending on what kind of creepy-crawly you have in mind.
- Dimitar Shterionov answered on 5 Nov 2018:
  
  I agree with Gary – different bugs live better under different conditions. Let’s take the fruit fly as an example. So, fruit flies can live for about 40-50 days and reproduce quite quickly, but they are very dependent on the temperature. If the temperature is 22 degrees Celsius and above then the fruit flies develop quite quickly and multiply. If the temperature is bellow 18 degrees Celsius, it takes twice as long (if compared to 22 degrees Celsius). And so, in colder times, like in the winter, they cannot survive.

Question: You know how bugs die in the winter, well what is it that kills them, the cold, their lifespan is just up or is it something else?