Live and learn... It is strange that I have lived for so long without ever noticing how the woodlice come out at night, in large numbers - hundreds creeping over the wooden fence around the garden, with local concentrations of a score or more, including babies. And scattered more thinly - dozens of the seldom-seen millipedes. And quite a few spiders, too.
I saw them only by chance - having forgotten to do some reorganising of the squirrel feeders during the day, I went out with a hammer and a head torch - and saw the above. Always had been there, presumably, but unknown to me.
All of them freeze when a light is shone upon them - clearly, in darkness is their (relative) safety; albeit, they are presumably one of the reasons why so many small, insectivorous, mammals are nocturnal.
The everyday world is apparently full of many yet unnoticed, or still undiscovered, things: some of them almost under-my-nose.