Pine False Webworm vs Light Cahill Mayfly
Side-by-side species comparison
| Attribute | Pine False Webworm | Light Cahill Mayfly |
|---|---|---|
| Scientific Name | Acantholyda erythrocephala | Heptagenia solitaria |
| Order | Hymenoptera | Ephemeroptera |
| Family | Pamphiliidae | Heptageniidae |
| Size | 10-15 mm (adult) | 9-13 mm |
| Habitat | Farmland | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Europe, North America | North America |
| Conservation | Not Evaluated | Least Concern |
Pine False Webworm
An invasive European sawfly that defoliates pines in North America. Unlike typical sawflies, larvae are solitary and spin silk tubes on branches.
Did You Know?
Larvae feed inside silken tubes spun among the needles, unlike the gregarious feeding of most pine sawflies.
Light Cahill Mayfly
A pale-colored mayfly highly prized by fly fishers for imitating hatches. Nymphs prefer moderate current over gravel substrates.
Did You Know?
The Light Cahill dry fly pattern, designed to mimic this species, has been used since the 1880s.