The house fly and other types of “filth flies” can become nuisance pests, but also are important for their potential to harm humans and animals. House flies, for example, can spread diseases such as food poisoning and dysentery. Flies, including stable flies and mosquitoes (which are also classified as flies, or Diptera), can inflict painful bites while feeding on the blood of humans and other animals, and some species transmit disease.

The habits of filth flies favour the spread of bacteria and other disease-causing organisms. Filth flies often feed and lay eggs on garbage, manure and carrion before contaminating human foods and food preparation surfaces by landing on them. When feeding, house flies regurgitate their stomach contents onto food to liquefy it before ingesting it. They also may contaminate food and surfaces by defecating on them.

Installing Insect Killer machines, spraying and fumigation, glue boards help control keeping the check on house flies.

Adults: adult mosquitos are slender true flies, usually less than 1 cm long. They have long thin legs and wings. Some other true flies look like mosquitos, but only mosquitos have the long thin mouthparts called a proboscis. Adult mosquitos have long antennae, and male mosquitoes’ antennae look very feathery. Like all true flies, mosquitos only have two wings. Their bodies and wings are covered with microscopic scales.

There are mosquitos all over the world, anywhere there is fresh water for their larvae. There are over 2,500 species of mosquitos in the world.

Mosquitoes need still freshwater or slightly salty water for their larvae to grow, but different species have evolved to use all different kinds of water. Some grow in ponds, some in puddles, some in tree holes, some in swamps, some in saltmarshes. They are most common and diverse in humid habitats but some can even be found in the arctic tundra, active during the brief summer.