Moth crypticity

A zillion years ago, when I was a real scientist, I became interested in crypticity - like why are some potential prey camouflaged, while others are not.

There's also a question here about fruit colouration and the evolution of colour vision in forgaging primates.

As I said, all that is a long time ago, but I've retained a fascination with insect camouflage, and this morning there was a nice example on the outside wall of our house:

note how the moth is nicely coloured to match the pattern of lichen growing on a tree branch ...