Riffle Beetle vs Labrador Minnow Mayfly
Side-by-side species comparison
| Attribute | Riffle Beetle | Labrador Minnow Mayfly |
|---|---|---|
| Scientific Name | Elmis aenea | Baetis labradoriensis |
| Order | Coleoptera | Ephemeroptera |
| Family | Elmidae | Baetidae |
| Size | 1.5-2.5 mm | 5-8 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Riffle Beetle
A tiny, dark beetle that spends its entire adult life underwater clinging to rocks in riffles. It breathes using a plastron, a permanent thin film of air.
Did You Know?
Its plastron air film never needs replenishing, allowing it to remain permanently submerged.
Labrador Minnow Mayfly
A small mayfly found in cold northern streams with rapid currents. Nymphs cling to submerged stones and feed on periphyton.
Did You Know?
Nymphs can complete their development in as little as three weeks during warm summer conditions.