Common Black Ground Beetle vs Thread-legged Bug

Side-by-side species comparison

Attribute Common Black Ground Beetle Thread-legged Bug
Scientific Name Pterostichus melanarius Emesaya brevipennis
Order Coleoptera Hemiptera
Family Carabidae Reduviidae
Size 12-18 mm 30-37 mm
Habitat Gardens Caves
Diet Predators Predators
Regions Europe, Introduced to North America North America
Conservation Least Concern Least Concern

Common Black Ground Beetle

One of the most abundant ground beetles in European farmland and gardens. It is a generalist predator active mainly at night.

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Did You Know?

It is one of the most commonly caught beetles in pitfall traps across Europe.

Thread-legged Bug

An extremely slender assassin bug with stick-like legs that hunts in spider webs. It plucks web strands to lure spiders close enough to seize and consume them.

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Did You Know?

It invades spider webs and mimics trapped prey vibrations to lure the resident spider within striking distance.