American Owlfly vs Japanese Alderfly
Side-by-side species comparison
| Attribute | American Owlfly | Japanese Alderfly |
|---|---|---|
| Scientific Name | Ululodes quadripunctatus | Sialis japonica |
| Order | Neuroptera | Megaloptera |
| Family | Ascalaphidae | Sialidae |
| Size | 20-30 mm body, 50-65 mm wingspan | 15-25 mm wingspan |
| Habitat | Meadows | Rivers & Streams |
| Diet | Predators | Predators |
| Regions | North America | Japan, East Asia |
| Conservation | Least Concern | Least Concern |
American Owlfly
A dragonfly-like neuropteran with split eyes and long knobbed antennae. It catches small insects on the wing during twilight flights.
Did You Know?
Its eyes are divided into upper and lower halves, allowing it to see both above and below simultaneously.
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.