Large Dark Olive Mayfly vs Arctic Chironomid Midge
Side-by-side species comparison
| Attribute | Large Dark Olive Mayfly | Arctic Chironomid Midge |
|---|---|---|
| Scientific Name | Baetis rhodani | Diamesa mendotae |
| Order | Ephemeroptera | Diptera |
| Family | Baetidae | Chironomidae |
| Size | 6-10 mm | 3-6 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Detritivores |
| Regions | Europe | Arctic Canada, Alaska, Greenland, Scandinavia, alpine regions worldwide |
| Conservation | Least Concern | Least Concern |
Large Dark Olive Mayfly
The most common European mayfly, emerging year-round in many rivers. It is a small olive-brown species that serves as a staple food for stream fish.
Did You Know?
This mayfly can produce up to three generations per year, making it available as fish food in every season.
Arctic Chironomid Midge
A slender, non-biting midge with long legs and feathery antennae in males. Larvae are among the first invertebrates to colonize glacial meltwater streams. Adults can be active at temperatures just above freezing.
Did You Know?
Diamesa midges can fly and mate at temperatures as low as minus 6 degrees Celsius, making them among the most cold-tolerant flying insects.