Bat fly

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The representatives of two closely related families of the two-winged flies (Diptera) are called bat flies . These are the Nycteribiidae (see bat flies ) and the Streblidae , which, as external or ectoparasites , have specialized in bats as hosts . The adaptations in both groups include the extremely flattened body shape and the hips shifted to the back, which lead to the legs spreading. There are a number of wingless species in both groups, but generally the transformation of the Nycteribiidae is more advanced.

The Nycteribiidae and Streblidae are often combined with the actual louse flies (Hippoboscidae) to form the louse flies in the broader sense (pupipara). All three groups give birth to larvae that pupate immediately after birth .


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