Common Fungus Gnat vs Red Lacewing

Side-by-side species comparison

Attribute Common Fungus Gnat Red Lacewing
Scientific Name Bradysia impatiens Cethosia biblis
Order Diptera Lepidoptera
Family Mycetophilidae Nymphalidae
Size 2-4 mm 80-95 mm wingspan
Habitat Underground Underground
Diet Fungus Feeders Nectar Feeders
Regions Cosmopolitan Southeast Asia (Philippines, Indonesia, Malaysia, Thailand, Myanmar, Vietnam)
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.

Red Lacewing

A large butterfly with brilliant red-orange wings boldly bordered in black and white. The underside features an elaborate network of red, white, and black in a striking lacework pattern.

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Did You Know?

The caterpillars are gregarious and covered in branching spines that deliver a mild sting, providing collective defense against predators.