Jejénum

Jejénum is a genus of small, biting midges belonging to the family Ceratopogonidae. These tiny insects are found worldwide and are known for their nuisance biting, particularly during twilight hours. Their common name, "no-see-ums," reflects their diminutive size, often making them difficult to see before they bite.

Adult jejénum are typically less than 3 millimeters in length and are characterized by their delicate wings, which often bear distinctive patterns. Both male and female jejénum feed on nectar and other plant juices, but only the females require a blood meal to develop their eggs. They are notorious biters and their saliva can cause itchy welts and allergic reactions in humans and other animals.

The life cycle of jejénum involves aquatic or semi-aquatic larval stages. Depending on the species, larvae can be found in a variety of moist habitats, including muddy shores, stagnant water, decaying vegetation, and even animal dung. These larvae are often predatory, feeding on small invertebrates.

Jejénum are significant pests in many regions due to their ability to transmit diseases. While not as well-known for disease transmission as some other biting insects, certain species of jejénum can act as vectors for viruses and parasites affecting livestock and wild animals. Control measures often focus on reducing breeding sites and using personal repellents to avoid bites.