Lesser House Fly vs Lesser Silver Water Beetle

Side-by-side species comparison

Attribute Lesser House Fly Lesser Silver Water Beetle
Scientific Name Fannia canicularis Hydrochara flavipes
Order Diptera Coleoptera
Family Fanniidae Hydrophilidae
Size 5-7 mm 12-16 mm
Habitat Indoors Ponds & Lakes
Diet Scavengers Scavengers
Regions Worldwide East Asia
Conservation Least Concern Least Concern

Lesser House Fly

A small greyish fly often seen flying in circles beneath ceiling lights indoors. It breeds in decaying organic matter and is a secondary forensic indicator.

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Did You Know?

Males are well known for hovering in a fixed triangular flight pattern beneath indoor light fixtures.

Lesser Silver Water Beetle

A medium-sized water scavenger beetle found in still waters across East Asia. Its legs have distinctive yellowish tarsi.

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Did You Know?

It is commonly encountered in rice paddies where it helps break down organic matter in the flooded fields.