(with pictures) A lot of small black flying insects suddenly appeared in the bathroom. Who knows what they are?

It may be a thief in the valley. Please check whether you have rice, noodles and other grains at home.

The grain thief, also known as the grain beetle, has a common adult of about 2mm. There are many kinds of food, mainly harmful to dry food, and the picture is not clear. Please check the small thief, the saw thief and the red thief and compare them.

Prevention and control: a large amount of grain stored in rural areas is generally fumigated with "aluminum phosphide" tablets;

Buy back the rice and flour thieves can take it out and expose it to the sun (if there is, don't use medicine directly on the grain); Spray mosquito aerosol indoors!

In addition: among insects, the valley thief is very seasonal, and it is rare after the season.