Cherry Gall: the rough with the smooth | Nature Notes from Dorset

The cherry gall (Cynips quercusfolii) is the product of the egg laying of a small species of gall wasp. It lays its eggs on the underside of oak (quercus) foliage (folii) and they develop there, sometimes one, sometimes a small collection. They start pale green (like the one I photographed) and become red as they mature and that is when they begin to look like cherries.
As with similar galls a single 'fruit' has several chambers in it, each with a single larva. 



Read more: Cherry Gall: the rough with the smooth | Nature Notes from Dorset

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