Trico Mayfly vs Small Brown Forestfly
Side-by-side species comparison
| Attribute | Trico Mayfly | Small Brown Forestfly |
|---|---|---|
| Scientific Name | Tricorythodes stygiatus | Nemoura avicularis |
| Order | Ephemeroptera | Plecoptera |
| Family | Leptohyphidae | Nemouridae |
| Size | 3-6 mm | 5-8 mm |
| Habitat | Rivers & Streams | Woodlands |
| Diet | Detritivores | Detritivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Trico Mayfly
A tiny mayfly that forms enormous morning spinner falls over calm streams and rivers. Males have distinctive white bodies with black thoraxes.
Did You Know?
Trico spinner falls create such dense blankets of spent mayflies on the water surface that trout gorge themselves to satiation.
Small Brown Forestfly
A small brown stonefly of European woodland streams that emerges in spring. Nymphs are detritivores feeding on submerged leaf litter.
Did You Know?
Adults fold their wings flat over the body like a fan, unlike most stoneflies that fold wings along the sides.