About 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.
How to Identify Petroleum Fly
Petroleum Fly (Helaeomyia petrolei) belongs to the order Diptera, family Ephydridae. Adults typically measure 5 mm.
Petroleum Fly Habitat
Petroleum Fly is found in underground habitats, particularly across North America. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Petroleum Fly Diet and Feeding
Petroleum Fly has an omnivorous diet, feeding on both plant and animal matter. This dietary flexibility allows it to exploit a wide range of food sources in its environment.
Where Is Petroleum Fly Found?
Petroleum Fly can be found in North America, where it inhabits underground environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Petroleum Fly can be found
Is Petroleum Fly Dangerous?
Petroleum Fly is generally harmless to humans. It does not bite or sting and poses no significant health risk. Like most insects, it prefers to avoid human contact and will typically flee rather than confront a perceived threat.
Petroleum Fly Role in Nature
Petroleum Fly plays a role in its ecosystem as part of the food web, serving as both consumer and prey. Insects like Petroleum Fly are a vital food source for birds, bats, and other wildlife, and contribute to the overall health and balance of their environment.
Seasonal Activity
Frequently Asked Questions About Petroleum Fly
What does Petroleum Fly look like?
The Petroleum Fly typically measures 5 mm.
Where is Petroleum Fly found?
The Petroleum Fly is found in North America and typically inhabits underground environments.
What does Petroleum Fly eat?
The Petroleum Fly has an omnivorous diet, feeding on both plant and animal matter.
Is Petroleum Fly dangerous to humans?
The Petroleum Fly is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Petroleum Fly?
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.
Cite This Page
APA:
InsectDiscover. (2026). Petroleum Fly (Helaeomyia petrolei). Retrieved from https://insectdiscover.com/insect/petroleum-fly
MLA:
"Petroleum Fly." InsectDiscover, https://insectdiscover.com/insect/petroleum-fly.