Oak leaf gall

Much more endearing than a pimple

More endearing than a pimple

I was clearing up after Galileo, who relieves himself close to the house first thing in the morning, when I caught sight of something sitting on a fallen oak leaf.

I thought at first it was a ladybird, but it was too round. Also it didn’t move when I picked the leaf up.

It was – is, because it’s sitting on my desk as a curiosity – a gall, caused by a gall wasp whose grub feeds on the lump of growth which the oak is stimulated to produce.

It’s a beautiful little object – symmetrical and sturdily attached. It can grow quite a lot bigger, but it doesn’t harm the tree.

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