Giant Black Water Beetle vs Malagasy Dobsonfly
Side-by-side species comparison
| Attribute | Giant Black Water Beetle | Malagasy Dobsonfly |
|---|---|---|
| Scientific Name | Hydrophilus triangularis | Neochauliodes madagascariensis |
| Order | Coleoptera | Megaloptera |
| Family | Hydrophilidae | Corydalidae |
| Size | 34-40 mm | 40-60 mm wingspan |
| Habitat | Ponds & Lakes | Rivers & Streams |
| Diet | Predators | Predators |
| Regions | North America | Madagascar |
| Conservation | Least Concern | Data Deficient |
Giant Black Water Beetle
The largest water beetle in North America, with a shiny black oval body. Larvae are voracious predators while adults are mainly plant feeders.
Did You Know?
It carries a bubble of air beneath its body like a silvery film, which it replenishes at the surface.
Malagasy Dobsonfly
A large, brown-winged insect with broad wings held tent-like over the body at rest. Males may have elongated mandibles. Larvae are aquatic and known as hellgrammites.
Did You Know?
The aquatic larvae are considered indicators of clean water quality, as they cannot tolerate polluted streams.