Bug FAQSynaxis hirsutaria
Synaxis hirsutaria · Order: Lepidoptera · Family: Geometridae
The forewings measure about 17 to 23 mm in length. Adults fly from early October through November. It occurs in California and the far southern part of Nevada in the United States.
Source: Wikipedia
Size
Forewing length ranges from 17 to 23 mm.
Source: Wikipedia
Where it lives
It is found in California and extreme southern Nevada.
Source: Wikipedia
What it eats
Larvae have been raised on Ceanothus, Cercocarpus, Prunus emarginata and Ribes malvaceum.
Source: Wikipedia
When you see it
Adults are on the wing from early October to November.
Source: Wikipedia
Where it comes from
Its range includes California and the far southern part of Nevada in the United States.
Source: Wikipedia
Where it is found in the US
Recorded in 4 of 51 states and DC. Most records: California, New Mexico, Nevada, Utah.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
Questions people ask
When are adult Synaxis hirsutaria active?
Adults are on the wing from early October through November.
Source: Wikipedia
What plants do the larvae feed on?
Larvae have been reared on Ceanothus, Cercocarpus, Prunus emarginata and Ribes malvaceum.
Source: Wikipedia
Same family (Geometridae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Tetracis_hirsutaria
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-28 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-28.