Yellow Swarming Fly vs Thick-headed Fly
Side-by-side species comparison
| Attribute | Yellow Swarming Fly | Thick-headed Fly |
|---|---|---|
| Scientific Name | Thaumatomyia notata | Physocephala rufipes |
| Order | Diptera | Diptera |
| Family | Chloropidae | Conopidae |
| Size | 2-2.5 mm | 8-14 mm |
| Habitat | Grasslands | Underground |
| Diet | Predators | Parasitoids |
| Regions | Europe | Europe |
| Conservation | Least Concern | Least Concern |
Yellow Swarming Fly
A tiny yellow fly famous for forming enormous hibernation aggregations in buildings, sometimes numbering millions. Larvae are predatory on root aphids in grassland.
Did You Know?
Can form hibernation clusters of millions in attic spaces, with individual aggregations weighing several kilograms.
Thick-headed Fly
A wasp-mimicking fly that parasitizes bumblebees by injecting eggs into them mid-flight.
Did You Know?
Infected bumblebees bury themselves in soil where the fly larva pupates.