Spotted Grass Moth vs Common Water Penny
Side-by-side species comparison
| Attribute | Spotted Grass Moth | Common Water Penny |
|---|---|---|
| Scientific Name | Rivula propinqualis | Psephenus herricki |
| Order | Lepidoptera | Coleoptera |
| Family | Crambidae | Psephenidae |
| Size | 15-20 mm wingspan | 4-6 mm (adults); 6-10 mm (larvae) |
| Habitat | Ponds & Lakes | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Eastern North America | Eastern North America |
| Conservation | Least Concern | Least Concern |
Spotted Grass Moth
A tiny yellowish moth with a distinctive dark spot on each forewing. It is extremely common in damp grassy habitats across eastern North America.
Did You Know?
Despite being one of the most abundant moths in its range, it is so small that most people never notice it.
Common Water Penny
A small aquatic beetle whose larvae are flattened and round like a copper penny, clinging to rocks in fast streams. Adults are terrestrial and short-lived.
Did You Know?
Larvae are so flat they can cling to rocks in torrential currents that would wash away most other insects.