Rutilia

Rutilia is a genus of large, metallic-green flies belonging to the family Tachinidae. These flies are often found in the Australasian region, particularly in Australia and New Zealand. They are characterized by their vibrant coloration, which can range from emerald green to bronze, and their robust bodies.

The larvae of Rutilia species are parasitoids, meaning they develop on or within a living host and eventually kill it. Adult Rutilia flies typically lay their eggs on the soil surface or on vegetation. The emerging larvae then seek out and infest the host, which is usually the larva of a beetle or moth. This parasitic relationship plays a significant role in regulating populations of their host insects in their natural habitats.

Adult Rutilia flies are often observed feeding on nectar from flowers, contributing to pollination. They are diurnal, meaning they are active during the day. Due to their striking appearance and their ecological role as parasitoids, Rutilia flies are of interest to entomologists studying insect biodiversity and ecological interactions. The genus Rutilia contains numerous species, each with specific host preferences and geographical distributions.