Hump-backed Fly vs Swallowtail Butterfly

Side-by-side species comparison

Attribute Hump-backed Fly Swallowtail Butterfly
Scientific Name Megaselia scalaris Papilio machaon
Order Diptera Lepidoptera
Family Phoridae Papilionidae
Size 2-3 mm 65-86 mm wingspan
Habitat Underground Underground
Diet Carrion Feeders Predators
Regions Worldwide Europe, Asia, North America
Conservation Least Concern Least Concern

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.

Swallowtail Butterfly

Elegant butterfly with yellow wings marked with black veins and blue-red eyespots on hindwings. The tail extensions on hindwings divert predator attacks from the body.

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Did You Know?

Swallowtail caterpillars have a hidden orange forked organ called an osmeterium that they pop out from behind their head when threatened, releasing a foul smell.