The Tzetze fly is a biting insect found in sub-Saharan Africa that is known to transmit diseases to both humans and animals. Synonyms for the Tzetze fly include the "glossina" or "tsetse" fly. These insects are infamous for their ability to spread sleeping sickness, a fatal disease that affects both humans and animals. Other synonyms for the Tzetze fly include "palpalis," "morsitans," "fusca," and "tabanidae." The Tzetze fly is a major public health concern in sub-Saharan Africa, where it continues to pose a significant threat to the health of both people and animals.