Small Rivulet vs Large Whirligig Beetle
Side-by-side species comparison
| Attribute | Small Rivulet | Large Whirligig Beetle |
|---|---|---|
| Scientific Name | Perizoma alchemillata | Dineutus americanus |
| Order | Lepidoptera | Coleoptera |
| Family | Geometridae | Gyrinidae |
| Size | 18-22 mm wingspan | 10-13 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Herbivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Small Rivulet
A delicate small moth found in damp habitats where hemp agrimony grows. The larvae feed inside the flowers. Has subtle grey and white wing markings.
Did You Know?
The larvae develop entirely within hemp agrimony flower heads, emerging only to pupate.
Large Whirligig Beetle
The largest North American whirligig beetle, found on the surface of streams and rivers. It produces defensive chemicals that smell like apples when disturbed.
Did You Know?
When alarmed, large groups scatter in erratic spirals, creating a confusing display that deters predators.