Malagasy Dobsonfly vs Japanese Alderfly
Side-by-side species comparison
| Attribute | Malagasy Dobsonfly | Japanese Alderfly |
|---|---|---|
| Scientific Name | Neochauliodes madagascariensis | Sialis japonica |
| Order | Megaloptera | Megaloptera |
| Family | Corydalidae | Sialidae |
| Size | 40-60 mm wingspan | 15-25 mm wingspan |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Predators | Predators |
| Regions | Madagascar | Japan, East Asia |
| Conservation | Data Deficient | Least Concern |
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.
Japanese Alderfly
A medium-sized alderfly found in ponds and slow streams across Japan. It is one of the most common megalopterans in East Asian lowland waters.
Did You Know?
It is one of the few megalopterans adapted to living in rice paddy fields.