There are no mosquitoes when the weather is cold. Where have all these mosquitoes gone?

The simplest answer is: because it is cold. Mosquitoes are cold-blooded animals, which means that they are not cold-tolerant, and prefer temperatures of 25℃ or higher. "When the temperature drops, they will lose the ability to fly or even move.

Where did they go? Unlike birds, mosquitoes don't fly south in groups in winter. What a terrible idea! ) They can't fly far. For male mosquitoes and female mosquitoes, there are different answers to the question "Where did the mosquitoes go in winter?" The male mosquitoes died directly, but not because of the cold. The lifespan of male mosquitoes is much shorter than that of female mosquitoes. Anyway, she died in autumn after mating.

However, female mosquitoes can survive the winter. They hibernate all winter. The hibernation process of female mosquitoes is called diapause. In autumn, female mosquitoes fly into the cracks in wood or ground and enter a diapause state. "They can hibernate in cold and water-free conditions for up to six months," said Jayme Bella, founder and CEO of Greenerways Organic, a pest control company. "They only wake up when it is warm and moist." When the environment gets warmer again, the female mosquitoes wake up and it's time to start collecting blood. They are ready to lay eggs and need as much blood as possible to provide nutrition for egg development. So yes, only female mosquitoes will bite you.

What temperature is cold for mosquitoes? Mosquitoes are more afraid of cold than humans. Most species begin to hibernate at 10℃. For most mosquitoes, the temperature of 10℃ is already very cold, and then the female mosquitoes begin to look for a place to hang. Some kinds of mosquitoes don't even need to be so cold. Some adult mosquitoes, both male and female, die in autumn, so they don't hibernate in cold seasons. These include mosquito species living in tropical climates, such as Aedes aegypti, the carrier of Zika virus. They began to die at 65438 05℃. Females usually die soon after laying eggs. For these mosquito species, their newly laid eggs will enter the winter stagnation period.