Common Mayfly vs Blue-Winged Olive
Side-by-side species comparison
| Attribute | Common Mayfly | Blue-Winged Olive |
|---|---|---|
| Scientific Name | Ephemera danica | Baetis tricaudatus |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Ephemeridae | Baetidae |
| Size | 15-25 mm body | 5-9 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Common Mayfly
Adults have no functional mouths and live only 1-3 days. Massive synchronized emergences called "hatches" are among natures great spectacles. Excellent water quality indicators.
Did You Know?
Mayflies have the shortest adult lifespan of any insect — some species live just 5 minutes as adults, long enough only to mate. They are the only insects with a winged sub-adult stage.
Blue-Winged Olive
A small olive-colored mayfly with distinctive bluish-gray wings, abundant in clean streams across North America. It produces multiple generations per year.
Did You Know?
Blue-winged olives are among the few mayflies that hatch in winter, providing vital food for trout during cold months.