Small Minnow Mayfly vs Yellow May Dun
Side-by-side species comparison
| Attribute | Small Minnow Mayfly | Yellow May Dun |
|---|---|---|
| Scientific Name | Callibaetis ferrugineus | Heptagenia sulphurea |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Baetidae | Heptageniidae |
| Size | 7-11 mm | 10-15 mm |
| Habitat | Ponds & Lakes | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Small Minnow Mayfly
A mottled brown mayfly common in still waters across North America. Nymphs are excellent swimmers that mimic small minnows.
Did You Know?
It can produce up to three generations per year in warm climates.
Yellow May Dun
A bright sulfur-yellow mayfly common across European rivers during early summer. Its flat nymphs are adapted to fast-flowing water on stony substrates.
Did You Know?
The striking yellow color of this mayfly makes it one of the most easily recognizable species on European rivers.