I don't know whether this is actually created by a spider (presumably more than one). I saw it in a field today. It stretched maybe 2-300 yards x 50 yards. The grass was glistening in the breeze and when I looked closer there were micro fine strands spread all over it. You could barely notice it. The strnads were long and straight, but everywhere. I took a couple of reference shots and would love to know what created this.