August 22nd – I note a fair crop of acorns this year, and like last, I was caught by false memory with the knopper galls.

I tend to think these parasite-created growths happen earlier in the year than they actually do, and always assume we’re not going to see any when they’ve not appeared by late July. Since they’re caused by a wasp larva hatching in the acorn bud, they can’t occur earlier than the fruit, can they?

The tiny wasp that drills it’s egg in to the fruit bud earlier in the year – coated in a secretion that will corrupt the bud’s growth plan into these curious galls – is pretty unremarkable. But the distorted, knobbly knopper galls are glossy, leathery and fascinating.

Nature can be very weird sometimes.