Tsetse flies are large, blood-sucking insects found primarily in sub-Saharan Africa. They belong to the genus Glossina and are known for their role in transmitting diseases such as sleeping sickness in humans and Nagana in livestock. These flies are typically found in rural areas near rivers and lakes, where they thrive in warm, humid environments. Tsetse flies are characterized by their distinctive appearance, with a long, slender body and a unique wing structure that folds back over their bodies when at rest. They are attracted to movement and dark colors, making them a nuisance for both people and animals in affected regions. Control measures include traps and insecticides to reduce their populations.