Diving Beetle vs Mahogany Dun
Side-by-side species comparison
| Attribute | Diving Beetle | Mahogany Dun |
|---|---|---|
| Scientific Name | Dytiscus marginalis | Isonychia harperi |
| Order | Coleoptera | Ephemeroptera |
| Family | Dytiscidae | Isonychiidae |
| Size | 27-35 mm | 13-17 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Predators | Omnivores |
| Regions | Europe, Asia | North America |
| Conservation | Least Concern | Least Concern |
Diving Beetle
A large, streamlined aquatic beetle with an olive-green body bordered in yellow. It carries an air bubble under its elytra and is a voracious underwater predator.
Did You Know?
Great diving beetles can stay submerged for extended periods by trapping a silvery air bubble under their wing covers that functions like a gill.
Mahogany Dun
A large reddish-brown mayfly with impressive filter-feeding forelegs. Nymphs prefer moderate to fast riffles with clean gravel substrates.
Did You Know?
Adults hold their forelegs forward in flight, making them easy to identify on the wing.