English Oak, Quercus robur, normal acorn and acorn parasitised by a wasp, Andricus quercuscalicis, causing Knopper Oak Gall

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Size: 7094px × 4729px
Location: Yorkshire Dales
Photo credit: © Neil Wilmore / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: acorns, andricus, august, ecology, english, gall, knopper, native, oak, parasite, pedunculate, plant, quercus, quercuscalicis, robur, tree, wasp