Black Clock Beetle vs Water-lily Reed Beetle
Side-by-side species comparison
| Attribute | Black Clock Beetle | Water-lily Reed Beetle |
|---|---|---|
| Scientific Name | Pterostichus madidus | Donacia simplex |
| Order | Coleoptera | Coleoptera |
| Family | Carabidae | Chrysomelidae |
| Size | 14-18 mm | 7-9 mm |
| Habitat | Gardens | Ponds & Lakes |
| Diet | Predators | Herbivores |
| Regions | Europe | Europe, Asia, North America |
| Conservation | Least Concern | Least Concern |
Black Clock Beetle
A common nocturnal ground beetle found throughout European gardens and farmland. It is jet black and a voracious predator of slugs and pest insects.
Did You Know?
Gardeners consider it one of the most beneficial beetles because a single individual can eat its body weight in slug eggs every night.
Water-lily Reed Beetle
A metallic coppery-bronze aquatic beetle with longitudinal ridges on the elytra. Adults sit on floating leaves of pondweeds and bur-reeds in still or slow-flowing water.
Did You Know?
Larvae construct a silken cocoon underwater attached to plant roots, filling it with air obtained from the plant's tissues for pupation.