Common Fungus Gnat vs Rat Flea

Side-by-side species comparison

Attribute Common Fungus Gnat Rat Flea
Scientific Name Bradysia impatiens Xenopsylla brasiliensis
Order Diptera Siphonaptera
Family Mycetophilidae Pulicidae
Size 2-4 mm 1.5-2.5 mm
Habitat Underground Underground
Diet Fungus Feeders Blood Feeders
Regions Cosmopolitan Africa, South America, India
Conservation Least Concern Least Concern

Common Fungus Gnat

A small, delicate dark fly with long legs and antennae that commonly infests houseplant soil. Adults are weak fliers that hover near potted plants and are attracted to light.

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Did You Know?

Fungus gnats are one of the most common houseplant pests worldwide, with larvae damaging roots of seedlings.

Rat Flea

A tropical rat flea found across Africa and South America that can transmit plague. It is second to the oriental rat flea in importance as a plague vector.

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Did You Know?

Despite its name suggesting Brazilian origin, it is most commonly found on rats throughout sub-Saharan Africa.