Blatella germanica , known as the "French cockroach," is one of the most common household pests. They are typically found in kitchens, as they prefer warm, humid spaces. Because this room provides water, food, and shelter, it's an ideal place for this insect to reside.

French cockroaches live in holes such as cracks in walls and crevices in the floor. They are on average 2 cm long and can live up to 200 days. They are nocturnal and avoid well-lit areas.

Periplaneta Americana is popularly known as the "Sewer Cockroach." It is one of the most common species in Brazil and has distinctive reddish wings, light spots on the thorax, and can fly. An aggressive species, it prefers warm, partially outdoor areas compared to other species. They are typically found in basements, drains, garbage cans, and sewers, and can transmit up to 60 types of parasites.

There are over two thousand species of ants in Brazil. Of these, approximately 30 are considered urban pests. In addition to causing damage to the structure of homes and even electrical and electronic equipment, these insects can transmit pathogenic diseases (which cause hospital infections), amoebiasis, and giardiasis, as well as carry protozoa, viruses, bacteria, and fungi.

Lepisma saccharina , commonly known as the "bookworm," typically feeds on carbohydrates such as sugars and starch, paper, book cover glue, hair, dandruff, dirt, cotton, linen, silk, artificial fibers, and even dead insects and the skin of molts. During a famine, they can ruin leather goods and artificial fiber cloth. They can survive for several months without food. Some of their characteristics include their antennae, which are thin and long, they have three thin, tail-like limbs, their legs are adapted for running, and they lack wings.

From the order Diptera , flies have sexual reproduction and most are oviparous, with a short life cycle, lasting around 30 days and are insects with complete metamorphosis (holometabolous) and present the following development phases: egg, larva, pupa and adult.

Urbanization has favored the reproduction of flies, which find food, shelter, and reproduction in garbage, food scraps, and other places. They can feed on feces, phlegm, pus, decaying animal and plant products, as well as sugar and fruit.

Also belonging to the order Diptera , mosquitoes, midges, and black flies are some of the numerous mosquitoes present throughout the country. When they bite people, in addition to the itching and irritation, bleeding, and allergic reactions they cause on the skin, they can also cause serious diseases. Malaria, dengue fever, leishmaniasis, yellow fever, paratyphoid fever, elephantiasis, and hymenolepiasis are the main ones. Swarms of mosquitoes can cause animals to stop eating and seek relief. The scratching mechanism can lead to skin damage.