Dahlia Longhorn vs Bordered Great Diving Beetle
Side-by-side species comparison
| Attribute | Dahlia Longhorn | Bordered Great Diving Beetle |
|---|---|---|
| Scientific Name | Agapanthia dahli | Dytiscus circumflexus |
| Order | Coleoptera | Coleoptera |
| Family | Cerambycidae | Dytiscidae |
| Size | 10-22 mm | 28-34 mm |
| Habitat | Farmland | Ponds & Lakes |
| Diet | Parasitoids | Omnivores |
| Regions | Europe, Turkey, Iran, Central Asia | Europe |
| Conservation | Least Concern | Near Threatened |
Dahlia Longhorn
A medium-sized longhorn with dense olive-green pubescence and a prominent yellow dorsal stripe on the pronotum. It is widely distributed across Europe and the Near East. Larvae develop inside the stems of umbellifers and composites.
Did You Know?
Larvae create a distinctive plug of frass at the base of the stem before pupating inside a silken cocoon.
Bordered Great Diving Beetle
A large British diving beetle similar to D. marginalis but with expanded yellow margins. It prefers larger, more permanent water bodies.
Did You Know?
Females have deeply grooved elytra while males have smooth ones, making the sexes easy to distinguish.