Common Bark Louse vs Web-spinning Barklouse

Side-by-side species comparison

Attribute Common Bark Louse Web-spinning Barklouse
Scientific Name Graphopsocus cruciatus Archipsocus nomas
Order Psocoptera Psocoptera
Family Stenopsocidae Archipsocidae
Size 3-4 mm 1.5-2.5 mm
Habitat Woodlands Forests
Diet Wood Feeders Omnivores
Regions Europe, North America Southeastern United States, Central America
Conservation Least Concern Least Concern

Common Bark Louse

A winged bark louse with distinctive cross-shaped wing markings found on tree trunks across Europe. It feeds on algae and lichen on bark.

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Did You Know?

Its cross-shaped wing pattern makes it one of the easiest bark lice to identify.

Web-spinning Barklouse

A bark louse known for spinning communal silk webs over tree bark in tropical and subtropical regions. Large colonies can cover entire tree trunks.

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Did You Know?

Their communal silk webs can cover entire tree trunks like a ghostly shroud.