After a whole summer of ravages and the last stroke of autumn, many flies and mosquitoes lost their ability to attack as the weather cooled down. In the corners and window sills, you can sometimes see dead mosquitoes that fall at an unknown time. When you are secretly happy in your heart that you finally can't see the disgusting flies and annoying mosquitoes because the weather is getting cold, have you ever wondered where the flies and mosquitoes that appear again in the next year will come from if they are frozen to death in winter? Where did the flies and mosquitoes who survived go in winter? And how do they survive the winter?
Let's start with flies. In fact, there are many kinds of flies, and different flies have different ways of spending the winter. Some flies have a short lifespan, laying their eggs in feces at the end of their lives. The fermented feces are fluffy and soft, which can play a role in heat preservation. When the weather warms up the next year, with suitable temperature and humidity, the fly begins to multiply again. Our common housefly is like this.
In addition to houseflies, there is also a common powder fly in our lives, which is relatively large. Like some small animals "cat winter", when the weather turns cold, powder flies will fly into the house to find gaps or holes to avoid the cold. This fly and the annoying housefly in summer belong to different families, but like the housefly, they also like to live in human settlements.
When we clean the house in the winter or when the weather is warmer in the spring, sometimes the flies that can't fly and climb and are very large are mostly powder flies that run around the house in winter.
Like flies, mosquitoes stop breeding after reaching their peak activity in August and September as the weather cools down in the fall and winter. Especially when the temperature drops below 10 ° C, mosquitoes die in large numbers. Only a very small number of stronger mosquitoes survived. Like powder flies, they look for everything they can do to avoid the cold, such as cracks in walls, behind wardrobes, or gaps in heating pipes. They need to slow down their metabolism and ensure that they don't starve to death, just like other animals hibernate.
Some mosquitoes are maintained like this, only to wait for the next spring to bloom, and they continue to come out to suck blood and lay eggs. Some mosquitoes overwinter in the form of eggs. In the summer, these mosquitoes lay a large number of eggs in the water, and the eggs in the water are frozen as the temperature drops but do not die, and when the weather warms up, they begin to hatch into larvae, that is, the widows. And according to research, some widows who have had time to metamorphose before the arrival of winter may survive a long and severe winter.
The wonder of nature lies in this, and every little life, whether beneficial or harmful to human beings, strives to survive in its own way and completes the reproduction of life, which also constitutes the complexity and richness of this vast world.
(Source: Popular Science China Network, Shanxi Science Popularization Network)