Tsetse (pronounced /ts/e-/ts/e, teet-SEE, or set-see) are large
biting flies from
Africa which live by feeding on the
blood of
vertebrate animals. Tsetse include all the species in the
genus Glossina, which are generally placed in their own family, Glossinidae. Tsetse have been extensively studied because they are
biological vectors of the African
trypanosomiases, deadly
diseases which include
sleeping sickness in people and
nagana in
cattle.Tsetse are crudely similar to other large flies, such as the
housefly, but can be distinguished by four characteristics of their
anatomy, two of which are easy to observe. Tsetse fold their wings completely when they are resting so that one wing rests directly on top of the other over their
abdomen. Tsetse also have a long
proboscis which extends directly forward and is attached by a distinct bulb to the bottom of their head.
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