Darkling Beetle vs Mother of Pearl Caddisfly

Side-by-side species comparison

Attribute Darkling Beetle Mother of Pearl Caddisfly
Scientific Name Eleodes obscura Mystacides azurea
Order Coleoptera Trichoptera
Family Tenebrionidae Leptoceridae
Size 20-35 mm 7-10 mm
Habitat Deserts & Drylands Rivers & Streams
Diet Detritivores Detritivores
Regions Western North America Europe, Asia
Conservation Least Concern Least Concern

Darkling Beetle

A flightless, black desert beetle that raises its abdomen in a headstand posture when threatened. It is well adapted to arid environments.

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Did You Know?

It can spray a foul-smelling chemical from its abdomen, earning it the nickname 'stink beetle.'

Mother of Pearl Caddisfly

A small iridescent caddisfly with long antennae and pearly blue-green wings. It swarms in large mating flights over lakes and slow rivers.

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Did You Know?

The iridescent wing scales of this caddisfly create a shimmering blue-green appearance unique among the Trichoptera.