Knopper galls

Knopper galls

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Caption: Knopper galls on acorns of an English oak (Quercus robur). These swellings are galls filled with the larvae of the gall wasp Andricus quercuscalicis. Photographed in August.

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Keywords: acorn, acorns, andricus quercuscalicis, animal, attached, august, biological, biology, botanical, botany, cluster, clustered, common oak, developing, development, durmast oak, english oak, entomology, fauna, flora, foliage, gall, gall wasp, galls, insect, insect life cycle, knopper gall, larva, larvae, larval, leaf, leaves, nature, nuts, oak tree, parasite, parasitic, pest, pests, plant, plant pathology, protective, quercus robur, ripening, stage, summer, tree, wildlife, zoological, zoology

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