Arthropods Abundant in American Homes

The average US household contains 62 distinct families of arthropod species, according to an entomological census.

Written byCatherine Offord
| 2 min read

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Carpet beetle larva (Anthrenus verbasci)WIKIMEDIA, ANDRE KARWATHIn the first complete census of arthropods living inside American households, entomologists in North Carolina identified an average of 62 arthropod families and 93 morphospecies per home, according to a study published this week (January 19) in PeerJ.

“The truth is that we’re all living with this vast diversity of arthropods and the majority of them are not overtly harmful,” study coauthor Michelle Trautwein of the California Academy of Sciences told The Christian Science Monitor. “We ought to consider them our quiet and benign roommates.”

From more than 10,000 specimens collected in 50 houses near Raleigh, the researchers identified 304 families of arthropod, of which 149 were rare. Speaking to The Atlantic, coauthor Matthew Bertone of North Carolina State University said, “I encountered organisms I’ve never seen before as an entomologist collecting for 15 years in North Carolina.”

The researchers found pest species in only a handful of the homes they visited, with cockroaches and fleas present in just 6 percent and 10 ...

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  • After undergraduate research with spiders at the University of Oxford and graduate research with ants at Princeton University, Catherine left arthropods and academia to become a science journalist. She has worked in various guises at The Scientist since 2016. As Senior Editor, she wrote articles for the online and print publications, and edited the magazine’s Notebook, Careers, and Bio Business sections. She reports on subjects ranging from cellular and molecular biology to research misconduct and science policy. Find more of her work at her website.

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