Why do wasps sting people in winter?

Experts say that this is related to the climate.

at 9: a.m. the day before yesterday, the fire squadron of zhangwan district, Shiyan City received help from the masses: there was a nest of wasps in the tile seam of a household in Tumen Community of Hanjiang Road, which had stung many people. After receiving the police, zhangwan district Fire Squadron immediately sent a group of officers and men to the scene with professional equipment.

The hornet's nest is located in the seam of asbestos shingles on the roof of a bungalow. The specific location of the hive can't be seen from the surface of the house. The asbestos shingles on the roof are fragile, so people can't climb up directly to check. According to the on-site situation, the on-site commander decided that two smaller soldiers should put on anti-bee suits, set up ladders on the flat ground in front of the house, climb to the roof, and open the asbestos tiles on the roof one by one along the load-bearing wall. Finally, firefighters found the wasp's lair when they uncovered a piece of asbestos tile on the leftmost side of the house. In an instant, a large number of wasps poured out and attacked two firefighters. Fortunately, the two firefighters were unscathed in advance. They quickly took out pesticides to spray and kill the wasp. After more than 3 minutes of fighting, the wasp died and fled at the scene, which could no longer threaten the safety of local residents.

According to common sense, it is the nesting period of wasps from May to October every year. During this period, wasps are fierce, manic and easy to hurt people. But in winter, when the temperature is low, wasps often stay in their nests, not moving much, and they won't hurt people. But why are people stung by wasps?

In this regard, Juck Zhang, an agronomist of Shiyan Agriculture Bureau, said that the abnormal behavior of wasps is related to the abnormal climate. Generally speaking, only in the weather below 5℃ will wasps "stay indoors". When the temperature is above 12℃, wasps will leave their nests and attack people when disturbed. The weather in Shiyan city has been fine in recent days, and the temperature at noon is mostly between 6℃ and 19℃, which is suitable for wasps to breed and store food, so wasps sting people.