The common house mosquito, a species of blood-feeding mosquito, has a greyish to reddish body, long slender legs, transparent wings and a needle-shaped mouthpart. Body length varies from 3 to 7 millimetres. The larvae have a breathing tube at the tip of the body and hang from the water surface, while the pupae have two breathing tubes and float with their heads up.
The common house mosquito can be found in all regions of the world except Antarctica. It is very common in Belarus and lives in particular in wet places, river floodplains and near lakes. The larvae and pupae live in still water.
Males feed on flower nectar, while females feed on both nectar and the blood of warm-blooded animals.