Bug FAQConvoluted Gall Wasp
Andricus confertus · Order: Hymenoptera · Family: Cynipidae
The wasps emerge as adults the following spring.
Source: Wikipedia
How to recognize it
Females are brown with lighter markings.
Source: Wikipedia
Size
Adults are about 2.5 mm (0.098 in) long.
Source: Wikipedia
Where it lives
They live on oak trees in California, North America.
Source: Wikipedia
Life cycle
Larvae create galls in summer and adult wasps emerge the next spring.
Source: Wikipedia
When you see it
Adults appear in spring after overwintering in galls.
Source: Wikipedia
Where it comes from
Their range is California in North America.
Source: Wikipedia
Where it is found in the US
Recorded in 48 of 51 states and DC. Most records: California, Texas, Virginia, Oregon, Florida, Massachusetts, Illinois, Ohio.
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
More photos
Questions people ask
When do the adult wasps appear?
Adults emerge in the spring following the summer when the galls were formed.
Source: Wikipedia
Same family (Cynipidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Andricus_confertus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.