Petroleum Fly vs Japanese Goldenring
Side-by-side species comparison
| Attribute | Petroleum Fly | Japanese Goldenring |
|---|---|---|
| Scientific Name | Helaeomyia petrolei | Anotogaster sieboldii |
| Order | Diptera | Odonata |
| Family | Ephydridae | Cordulegastridae |
| Size | 5 mm | 80-93 mm |
| Habitat | Underground | Mountains |
| Diet | Omnivores | Omnivores |
| Regions | North America | Asia |
| Conservation | Least Concern | Least Concern |
Petroleum Fly
The only insect whose larvae develop in crude petroleum. Found in natural oil seeps in California, including the La Brea Tar Pits. Larvae eat insects trapped in the oil.
Did You Know?
This is the only animal on Earth that develops in crude oil — a substance toxic to virtually all other life. Its larvae swim through petroleum and breathe through snorkel-like tubes.
Japanese Goldenring
One of the largest dragonflies in East Asia with bold black and yellow body rings. It is widespread along mountain streams throughout Japan.
Did You Know?
It is known to catch and eat Asian giant hornets, one of the few insects that can overpower them.