Andricus quercuslanigera (Hymenoptera: Cynipidae)
Primavera Park, Manteca, San Joaquin County, California
November 5, 2007

Oak galls on Quercus virginiana (southern live oak). This oak is not native in California but is sometimes planted in parks and other locations in the state. The galls on this oak are made by wasps also not native to California. Both the oak and wasp are native to the eastern U.S.