Stalk-Eyed Fly vs Okinawan Firefly
Side-by-side species comparison
| Attribute | Stalk-Eyed Fly | Okinawan Firefly |
|---|---|---|
| Scientific Name | Teleopsis dalmanni | Luciola owadai |
| Order | Diptera | Coleoptera |
| Family | Diopsidae | Lampyridae |
| Size | 6-10 mm body (eye span up to 25 mm) | 5-8 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Fungus Feeders | Omnivores |
| Regions | Asia | East Asia, Japan, Ryukyu Islands |
| Conservation | Least Concern | Near Threatened |
Stalk-Eyed Fly
Males have eyes on the tips of long rigid stalks that can span wider than their body length. Females prefer males with wider eye spans, driving extreme sexual selection.
Did You Know?
Males compete by facing each other and comparing eye span — the wider-eyed male wins. Females prefer wide-eyed males because eye span indicates good genes.
Okinawan Firefly
A subtropical firefly endemic to the Ryukyu Islands with a small dark body and rapid greenish flash. It is one of several firefly species unique to the southern Japanese islands.
Did You Know?
The Ryukyu Islands are a hotspot of firefly endemism, with several species found nowhere else on Earth.