Black Sedge vs Blackburn's Damselfly
Side-by-side species comparison
| Attribute | Black Sedge | Blackburn's Damselfly |
|---|---|---|
| Scientific Name | Silo nigricornis | Megalagrion blackburni |
| Order | Trichoptera | Odonata |
| Family | Goeridae | Coenagrionidae |
| Size | 7-9 mm body | 30-40 mm |
| Habitat | Rivers & Streams | Forests |
| Diet | Omnivores | Omnivores |
| Regions | Europe | Oceania (Hawaii) |
| Conservation | Least Concern | Endangered |
Black Sedge
A caddisfly whose larvae build heavy cases from sand grains cemented with silk. Found in clean, stony streams. Cases have lateral flanges of larger stones for ballast.
Did You Know?
Larval cases have added flanges of larger stones that act as ballast, preventing the case from being swept away.
Blackburn's Damselfly
A Hawaiian endemic damselfly historically found on multiple islands but now restricted to a few locations. It breeds in streams and seeps in native forests. It is one of the most threatened members of the remarkable Megalagrion radiation.
Did You Know?
Hawaiian Megalagrion damselflies have evolved to breed in an extraordinary range of habitats, from streams to tree holes to damp leaf litter.