Japanese Whirligig Beetle vs Hawaiian Damselfly
Side-by-side species comparison
| Attribute | Japanese Whirligig Beetle | Hawaiian Damselfly |
|---|---|---|
| Scientific Name | Gyrinus japonicus | Megalagrion hawaiiense |
| Order | Coleoptera | Odonata |
| Family | Gyrinidae | Coenagrionidae |
| Size | 5-8 mm | 35-45 mm |
| Habitat | Ponds & Lakes | Forests |
| Diet | Omnivores | Omnivores |
| Regions | Japan, Korea, China | Hawaii |
| Conservation | Least Concern | Vulnerable |
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.
Hawaiian Damselfly
An endemic Hawaiian damselfly with red or orange coloring found near streams. It breeds in flowing water in native forest streams.
Did You Know?
Hawaii's damselflies evolved to breed in unusual habitats including tree holes and leaf axils.