St Mark's Fly vs Goldsmith Beetle
Side-by-side species comparison
| Attribute | St Mark's Fly | Goldsmith Beetle |
|---|---|---|
| Scientific Name | Bibio johannis | Cotalpa lanigera |
| Order | Diptera | Coleoptera |
| Family | Bibionidae | Scarabaeidae |
| Size | 6-10mm | 20-26mm |
| Habitat | Underground | Orchards |
| Diet | Root Feeders | Root Feeders |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
St Mark's Fly
A small black fly that swarms in May. Males have large heads with huge eyes that almost meet on top.
Did You Know?
Often confused with the larger Bibio marci but emerges slightly later and has entirely dark legs.
Goldsmith Beetle
A beautiful golden-yellow scarab beetle with a metallic luster and fuzzy underside. It is attracted to lights on warm summer nights.
Did You Know?
Its genus name Cotalpa means golden shield referring to its remarkably bright metallic golden coloration.