California Web Spinner vs Deathwatch Beetle

Side-by-side species comparison

Attribute California Web Spinner Deathwatch Beetle
Scientific Name Oligotoma moestum Xestobium rufovillosum
Order Embioptera Coleoptera
Family Oligotomidae Ptinidae
Size 7.0-10.0 mm 5-9 mm
Habitat Gardens Woodlands
Diet Wood Feeders Wood Feeders
Regions North America, Asia Europe
Conservation Not Evaluated Least Concern

California Web Spinner

A small introduced web spinner now established in California and other warm parts of the United States. It is commonly found in gardens and around buildings.

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Did You Know?

This species was accidentally introduced to the Americas and is now one of the few web spinners most North Americans ever encounter.

Deathwatch Beetle

A small, mottled brown wood-boring beetle that creates a distinctive tapping sound by banging its head against tunnel walls. Larvae can take years to develop in old timber.

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Did You Know?

Its eerie tapping in quiet rooms at night was historically associated with impending death, giving the beetle its macabre common name.