Wood-boring Barklouse vs Ilia Underwing

Side-by-side species comparison

Attribute Wood-boring Barklouse Ilia Underwing
Scientific Name Psilopsocus mimulus Catocala ilia
Order Psocoptera Lepidoptera
Family Psilopsocidae Erebidae
Size 2-3 mm 70-95 mm wingspan
Habitat Woodlands Woodlands
Diet Wood Feeders Predators
Regions Central America, South America Eastern North America from southern Canada to the Gulf states
Conservation Least Concern Least Concern

Wood-boring Barklouse

An unusual psocid that bores into dead wood rather than living on bark surfaces. It creates small tunnels in decaying timber.

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Did You Know?

It is one of the very few bark lice that actually bores into wood.

Ilia Underwing

A large moth with bark-patterned gray forewings that conceal bright reddish-orange and black hindwings. When startled, it flashes its colorful hindwings to confuse predators.

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Did You Know?

It rests head-down on tree trunks during the day, where its cryptic forewings blend perfectly with oak bark.