"The moment one gives close attention to any thing, even a blade of grass, it becomes a mysterious, awesome, indescribably magnificent world in itself." Henry Miller
Click on the photos to enlarge.
There is a well camouflaged praying mantis nymph inside that circle. They rely on camouflage to hunt, sitting unseen until their insect prey come within striking range -- and then seizing them. It's pretty darned good camouflage. I wonder how many of these we pass without seeing them.