Fly larva in globeflower fruit. Maggot (larva) of a Chiastocheta fly feeding on the seed of a fruit of the globeflower (Trollius europaeus). This fly plays a vital role in the life cycle of this plant, helping to pollinate the plant as well as feeding on its seeds. This is an example of obligate mutualism. This plant is found in Europe and Western Asia. Photographed in Europe.
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