Fleas are solely blood-sucking ectoparasites that parasitize warm-blooded animals. They belong to the Siphonaptera Order. They have no wings, and their body is laterally flattened, which allows them to move without difficulty between the fur of the animals they parasitize. The spines projected back on the surface of their body make it easy for them to move between fur or feathers and make it difficult to catch them. Their long and powerful legs allow them to jump vertically up to 20 cm, and 40 cm horizontally. Adults have a perforating and sucking mouthpiece. They undergo a complete metamorphosis (egg, larva, pupa and adult). The female lays 300 to 400 eggs on the floor, carpets, beds, furniture, etc; under favourable conditions they hatch in 7 to 14 days. The larvae, like tiny worms, have a chewing mouthpart and feed on organic debris and excrement from adult fleas. Depending on environmental conditions and food availability, they pupate in a week, up to several months. Once its development is complete, the adult flea does not immediately emerge from its pupal shell; A few days, months and even a year may pass, which explains the presence of fleas in places that have been uninhabited for quite long periods.