Small Rivulet vs Bee Killer Robber Fly
Side-by-side species comparison
| Attribute | Small Rivulet | Bee Killer Robber Fly |
|---|---|---|
| Scientific Name | Perizoma alchemillata | Mallophora bomboides |
| Order | Lepidoptera | Diptera |
| Family | Geometridae | Asilidae |
| Size | 18-22 mm wingspan | 20-28 mm |
| Habitat | Rivers & Streams | Farmland |
| Diet | Herbivores | Herbivores |
| Regions | Europe | Eastern United States from New England to Florida |
| Conservation | Least Concern | Least Concern |
Small Rivulet
A delicate small moth found in damp habitats where hemp agrimony grows. The larvae feed inside the flowers. Has subtle grey and white wing markings.
Did You Know?
The larvae develop entirely within hemp agrimony flower heads, emerging only to pupate.
Bee Killer Robber Fly
A large fuzzy robber fly that closely resembles a bumble bee in both appearance and buzzing flight. It perches on vegetation and launches aerial attacks on passing insects.
Did You Know?
Its bumble bee mimicry is so convincing that it can sit among real bees at flowers without being recognized as a predator.