The bugs in the water are full of twists and turns when swimming. It is about a centimeter long and black, like a very short and tiny earthworm. What kind of bug is this?

This is a mosquito larva: this is the intermediate stage of mosquito growth from egg to pupa. It is made of mosquito eggs hatched in water and has a slender body. Compared with its head or abdomen, its chest is wider. When swimming, its body bends and stretches, so it is usually called autumn worm.

The magic weapon to maintain normal breathing is the breathing tube generated at the end of the tail. Stand upside down underwater, put the breathing tube into the water and breathe the air directly.

Extended data:

Newly emerged mosquitoes excrete pupa dung, and newborn mosquitoes can only take off when their wings are hard. Within 24 hours after emergence, the male mosquito completely reverses the abdominal segment180 to complete the mating posture. Mating movements vary from species to species, and some form mosquito rows in the open fields at dusk for group dancing.

The mosquito column is not necessarily composed of only one male mosquito, but often several different mosquito species. At this time, when the female mosquitoes saw the group dance, they flew close to the mosquito column and left after mating with the male mosquitoes of the same kind. Mating usually takes 10-25 seconds.