Biology of Tabanidae (Diptera): Mating and Feeding Behavior of Chrysops fuliginosus1

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Abstract
Mating and feeding behavior of Chrysops fuliginosus Wiedemann was studied over 5 seasons on a salt marsh in Delaware. This fly has a nonhovering type of mating behavior that is governed by air temperature. In the early morning, males are active before females and begin pursuit flights from a “waiting attitude” at 18–19°C. Initiation of coupling occurred at 19–20°C. The time of termination of coupling related to the rate of warming of the environment; rapid warming gave shorter duration of coupling. Female hunting and biting activities began at 24–25°C.

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