Common Thick-headed Fly vs Hump-backed Fly

Side-by-side species comparison

Attribute Common Thick-headed Fly Hump-backed Fly
Scientific Name Sicus ferrugineus Megaselia scalaris
Order Diptera Diptera
Family Conopidae Phoridae
Size 8-12 mm 2-3 mm
Habitat Underground Underground
Diet Nectar Feeders Carrion Feeders
Regions Europe Worldwide
Conservation Least Concern Least Concern

Common Thick-headed Fly

A distinctive orange-brown fly with a disproportionately large, inflated head and a curved abdomen. It perches conspicuously on flowers waiting to intercept passing bumblebees.

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Did You Know?

The parasitized bumblebee eventually dies and buries itself in the ground, where the fly larva pupates inside the bee.

Hump-backed Fly

A tiny scuttle fly with a distinctly humped thorax that breeds in an extraordinary range of organic matter. It is forensically important especially in enclosed burial sites.

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Did You Know?

It can colonize buried or concealed bodies that are inaccessible to larger blow flies.