They are known to be very small, and they have very long legs. They are not good fliers.
What they eat and some general information
They are insects with winds although they are not very good at flying. Some people think that they are some infants of a larger group of insects. They are full scale insects and adults. Some of them are biting, and some of them are nonbiting. Their food is usually other insects, blood, and plants. It all depends on which species we are talking about. Some female species like those of the black gnat are feeding on blood. Since they are feeding on blood, they are known for transmitting diseases to animals and humans. Livestock is the most vulnerable type of animals. Almost all countries in the world have means of controlling the gnat population because they are known to transmit some of the most dangerous diseases.
How to get rid of them?
It all depends on which gnat species you are being infested with. If you have gnats that like fungus sources, then you should dry out the soil, or you should try to dig over that soil. The imperative is to dry the soil because this is the best way to kill all those larvae in the soil. If you see some gnats that are in your home, you could remove them with chemicals or with a simple vacuum cleaner. This is the safest method. However, if they are persistent, then use some spraying chemical that will instantly kill them. You can even try to starve them out.
Their food source needs to be moved or destroyed. If they are feeding on fruit, you will need to put the fruit into the refrigerator to protect it from these insects. If you have plants in your home, water them only when they need watering. This is the simplest way to prevent gnat infestation. The best idea is to call exterminators to check your home and to see what your next moves are. They will tell you what to do and what are the next steps in getting rid of the infestation. There are some known ways that you can try to get rid of them. Fly swatters are commonly used in the attempt to get rid of them. But if you want to be sure, you should let someone who is a professional to handle the situation.
You could try with electric exploders that can kill gnats. They are quite effective, but they can also kill insects that can do good to your household. The UV traps inside could also kill insects because they emit UV light and when gnats see that light they will be attracted by it. This is also a good way to get rid of them. Whichever method you choose, make sure that it is safe and always ask for an opinion. Be safe and protect your family.