Sod Webworm Moth vs Yellow May Dun
Side-by-side species comparison
| Attribute | Sod Webworm Moth | Yellow May Dun |
|---|---|---|
| Scientific Name | Crambus praefectellus | Heptagenia sulphurea |
| Order | Lepidoptera | Ephemeroptera |
| Family | Crambidae | Heptageniidae |
| Size | 18-22 mm wingspan | 10-15 mm |
| Habitat | Gardens | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Sod Webworm Moth
A small straw-colored moth that holds its wings tightly rolled around its body at rest, giving it a tubular appearance. Its larvae create silk-lined tunnels in lawn thatch.
Did You Know?
Homeowners often first notice them as small pale moths that flush up in clouds when walking across the lawn at dusk.
Yellow May Dun
A bright sulfur-yellow mayfly common across European rivers during early summer. Its flat nymphs are adapted to fast-flowing water on stony substrates.
Did You Know?
The striking yellow color of this mayfly makes it one of the most easily recognizable species on European rivers.