Tachinid fly

Tachinidae is a large and rather variable family most of whose larvae are
internal parasites of caterpillars and other young insects. Some attack adult bugs and grasshoppers. Adults are bristly and resemble Calliphoridae, but distinguished from them by the prominent post-scutellum bulging beneath the scutellum. The 4th long vein is sharplybent. The thoracic squamae is usually very large.
Many species are commonly found on flowers.