Japanese Alderfly vs Red-Headed Cardinal Beetle
Side-by-side species comparison
| Attribute | Japanese Alderfly | Red-Headed Cardinal Beetle |
|---|---|---|
| Scientific Name | Sialis japonica | Pyrochroa serraticornis |
| Order | Megaloptera | Coleoptera |
| Family | Sialidae | Pyrochroidae |
| Size | 15-25 mm wingspan | 14-20 mm |
| Habitat | Rivers & Streams | Hedgerows |
| Diet | Predators | Predators |
| Regions | Japan, East Asia | Europe |
| Conservation | Least Concern | Least Concern |
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.
Red-Headed Cardinal Beetle
A vivid red beetle with serrated antennae found on flowers and under bark. Larvae are predatory and live beneath the bark of dead trees.
Did You Know?
Unlike most beetles, the bright red color is not a warning of toxicity but may mimic toxic species.