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Clustered Gall Wasp (Andricus brunneus)

The clustered gall wasp (Andricus brunneus) induces galls that are more or less spherical and occur in tight clusters on the undersides of many white oak leaves. These galls are covered in fine hairs, much like the leaves themselves.


Clustered gall wasp (Andricus brunneus), galls on blue oak (Quercus douglasii). Focus-stacked composite of 35 exposures at ~2x lifesize. Vacaville, Solano County, California, USA.
GAL0115

Next Gall: Convoluted gall wasp (Andricus confertus)



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All images copyright Timothy Boomer. All rights reserved worldwide.