Black Mayfly vs Spiny Oak Slug Moth
Side-by-side species comparison
| Attribute | Black Mayfly | Spiny Oak Slug Moth |
|---|---|---|
| Scientific Name | Ephemera danica var. nigra | Euclea delphinii |
| Order | Ephemeroptera | Lepidoptera |
| Family | Ephemeridae | Limacodidae |
| Size | 15-25 mm body | 22-30 mm wingspan |
| Habitat | Rivers & Streams | Orchards |
| Diet | Omnivores | Omnivores |
| Regions | Europe | Eastern North America |
| Conservation | Least Concern | Least Concern |
Black Mayfly
A dark color variant of the common Green Drake mayfly found in some European populations. The dark form is more prevalent in upland, acidic waters. Important for trout feeding.
Did You Know?
The dark form predominates in acidic upland streams while the typical yellow form prefers alkaline lowland rivers.
Spiny Oak Slug Moth
A small colorful moth with green, brown, and silver-spotted forewings. Its flattened, jewel-like caterpillar is green with red and yellow markings and bears stinging spines.
Did You Know?
The ornate caterpillar has been called one of the most beautiful in North America despite its painful sting.