Hagenius brevistylus lost mass by evaporation in a moderately desiccating environment at the rate of 20.4 mg h−1, and died of desiccation in less than 1 day at a body mass of 79.8% of their normally hydrated mass. It was estimated thatHagenius minimally would have to consume the equivalent of 60% of its body mass each day to meet its daily water requirements. This amount of food is equivalent to that necessary to power flight of a dragonfly for 4.6h.
Evaporation Hydrate Water Requirement Daily Water Power Flight
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C.R. Tracy, B.J. Tracy and D.S. Dobkin, Physiol. Zool., in press (1979).Google Scholar