Horse Stomach Bot Fly vs White Miller Mayfly
Side-by-side species comparison
| Attribute | Horse Stomach Bot Fly | White Miller Mayfly |
|---|---|---|
| Scientific Name | Gasterophilus intestinalis | Ephoron virgo |
| Order | Diptera | Ephemeroptera |
| Family | Oestridae | Polymitarcyidae |
| Size | 12-16 mm | 12-18 mm |
| Habitat | Farmland | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Cosmopolitan wherever horses are kept | Europe, Western Asia |
| Conservation | Least Concern | Least Concern |
Horse Stomach Bot Fly
A bee-like fly that glues eggs to horse leg hairs where they are ingested during grooming. Larvae attach to the stomach lining and develop for months before passing out.
Did You Know?
Larvae survive the acidic horse stomach by secreting a protective alkaline buffer around themselves.
White Miller Mayfly
A white-bodied European mayfly that emerges in enormous synchronized swarms at dusk. Females are unique among mayflies in that they moult directly into the spinner stage.
Did You Know?
Swarms at bridges and streetlights can be so thick they cause traffic hazards.