Petroleum Fly vs Lesser Cattle Grub
Side-by-side species comparison
| Attribute | Petroleum Fly | Lesser Cattle Grub |
|---|---|---|
| Scientific Name | Helaeomyia petrolei | Hypoderma lineatum |
| Order | Diptera | Diptera |
| Family | Ephydridae | Oestridae |
| Size | 5 mm | 11-13 mm |
| Habitat | Underground | Farmland |
| Diet | Omnivores | Parasites |
| Regions | North America | North America, Europe, 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.
Lesser Cattle Grub
A hairy, bee-like fly slightly smaller than H. bovis, whose larvae also parasitize cattle. Unlike H. bovis, its larvae migrate through the esophageal wall rather than the spinal canal. It causes significant hide damage and meat trim losses in the cattle industry.
Did You Know?
Warble damage to cattle hides makes them unsuitable for premium leather, costing the cattle industry millions in hide value annually.