Close-up of a distorted knopper gall growth on an acorn (from a Pedunculate oak tree - Quercus robur) caused by the parasitic larva of a cynipid gall wasp (Andricus quercuscalicis). The gall wasp larva develops within a hard inner gall, providing it with both food and protection. Photographed in Dorset, UK, in September.

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TOP24703079

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達志影像

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RM

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須由TPG 完整授權

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