Japanese Whirligig Beetle vs Red-bellied Rove Beetle
Side-by-side species comparison
| Attribute | Japanese Whirligig Beetle | Red-bellied Rove Beetle |
|---|---|---|
| Scientific Name | Gyrinus japonicus | Tasgius melanarius |
| Order | Coleoptera | Coleoptera |
| Family | Gyrinidae | Staphylinidae |
| Size | 5-8 mm | 15-20 mm |
| Habitat | Ponds & Lakes | Gardens |
| Diet | Omnivores | Predators |
| Regions | Japan, Korea, China | Europe, introduced to North America and Australia |
| Conservation | Least Concern | Least Concern |
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.
Red-bellied Rove Beetle
A large, shiny black rove beetle with a reddish-brown abdominal tip, found in synanthropic habitats across Europe. It is commonly encountered in gardens and urban areas where it hunts at night.
Did You Know?
This beetle is one of the most synanthropic rove beetles, frequently entering houses and cellars where it is often mistaken for an earwig.