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UK Nature > Flies > Phasia obesa
Scientific Name: Phasia obesa
Common Name: Tachinid Fly
Phasia obesa is a species of parasitic fly belonging to the family Tachinidae, subfamily Phasiinae and is present throughout most of Europe. The adults grow up to 4–6 millimetres long and can mostly be encountered from June through September feeding on nectar of flowers (especially of Asteraceae species).
They have large red compound eyes and the body is greysh, with four longitudinal black bands interspersed with clear bands of the same thickness on mesonotum. The large wings show a light brownish shading with the cell R5 closed at the edge. The larvae of Phasia obesa are parasitoids on adults or nymphs of various species of plant bugs.
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