In this picture, there are 47 cats*. None of them can be seen.
This is Ms. Artemis Mousekiller, 42 Wyvern Oaks, and she has learned the first lesson of how not to be seen: not to stand up.
However, she has chosen a very obvious piece of cover (Maddy interruption notwithstanding).
But since we are not into pyrotechnics in the barn, we'll have to leave our Monty Python skit and just point her out.
I should mention that in Artemis' case, not being seen means more attack options for unsuspecting passers-by. It's especially effective at 6 a.m. when I'm not quite awake.
* Slight exaggeration. There's only one... that I know of.