Brown Cockroach vs Japanese Whirligig Beetle
Side-by-side species comparison
| Attribute | Brown Cockroach | Japanese Whirligig Beetle |
|---|---|---|
| Scientific Name | Periplaneta brunnea | Gyrinus japonicus |
| Order | Blattodea | Coleoptera |
| Family | Blattidae | Gyrinidae |
| Size | 25-35 mm | 5-8 mm |
| Habitat | Underground | Ponds & Lakes |
| Diet | Omnivores | Omnivores |
| Regions | Pantropical, southeastern United States | Japan, Korea, China |
| Conservation | Not Evaluated | Least Concern |
Brown Cockroach
A glossy reddish-brown cockroach often confused with the American cockroach. It is slightly smaller with a more uniform color.
Did You Know?
It glues its egg cases to surfaces rather than dropping them, unlike the American cockroach.
Japanese Whirligig Beetle
A common whirligig beetle in East Asia found on still and slow-flowing water surfaces. It forms large social groups especially in autumn.
Did You Know?
It uses the Marangoni effect, exploiting surface tension gradients to propel itself rapidly across water.