This photo comes from reader Pradeep on Facebook, though I don’t know if he took it. At any rate, there’s an animal hiding on the tree. Can you spot it? I’d rate this “pretty easy if you look carefully”.
It shows the power of camouflage, in this case surely produced by natural selection eliminating less camouflaged individuals—the ones who got eaten by bird predators.
If you do, just say “I did” or “I didn’t” in the comments rather than give it away. I’ll put up the solution at noon Chicago time.