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California Gall Wasp (Andricus quercuscalifornicus)

The California gall wasp (Andricus quercuscalifornicus) induces large galls on a variety of white oaks. Though not especially showy, these galls can grow to be as big as potatoes!


California gall wasp (Andricus quercuscalifornicus), cluster of galls on valley oak (Quercus lobata). Effie Yeaw Nature Center, Sacramento County, California, USA.
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California gall wasp (Andricus quercuscalifornicus), cluster of galls on valley oak (Quercus lobata). Effie Yeaw Nature Center, Sacramento County, California, USA.
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Next Gall: California jumping gall wasp (Neuroterus saltatorius)



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All images copyright Timothy Boomer. All rights reserved worldwide.