Small Square-Gilled Mayfly vs Mountain Flathead Mayfly
Side-by-side species comparison
| Attribute | Small Square-Gilled Mayfly | Mountain Flathead Mayfly |
|---|---|---|
| Scientific Name | Caenis luctuosa | Cinygmula ramaleyi |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Caenidae | Heptageniidae |
| Size | 3-6 mm | 7-10 mm |
| Habitat | Ponds & Lakes | Mountains |
| Diet | Omnivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Small Square-Gilled Mayfly
A minute mayfly with distinctive square-shaped gills on its nymphs. Adults swarm in enormous numbers near water at twilight.
Did You Know?
The enlarged second gill plate acts as a protective cover over the remaining delicate gills.
Mountain Flathead Mayfly
An alpine mayfly restricted to high-elevation cold streams in the Rocky Mountains. Nymphs feed on diatom films on boulder surfaces.
Did You Know?
This species cannot survive in water temperatures above 15 degrees Celsius.