Bug FAQCanestrini's Harvestman
Opilio canestrinii · Order: Opiliones · Family: Phalangiidae
Males grow up to about 6 mm and females up to about 8 mm in length. Males are yellow-brown to reddish with dark legs and yellow coxae and knees, while females are lighter, have banded legs, and a dark saddle-shaped pattern with a light stripe on the back. They are most often seen on house walls from June through December and likely originated in Italy.
Source: Wikipedia
How to recognize it
Males are yellowish brown to reddish, have dark legs, and yellow coxae and knees.
Source: Wikipedia
Size
Males reach up to 6 mm and females up to 8 mm in body length.
Source: Wikipedia
Where it lives
They are most often found on house walls.
Source: Wikipedia
When you see it
Adults are present from June to December.
Source: Wikipedia
Where it comes from
The species probably originates from Italy.
Source: Wikipedia
Where it is found in the US
Recorded in 1 of 51 states and DC. Most records: Washington.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: introduced in North America; introduced in Canada; introduced in United States. Source: iNaturalist
Questions people ask
Same family (Phalangiidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Opilio_canestrinii
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-22 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.