|Polyphemus moth cocoon|
I wanted to hike to a different spot, and I went back to the car to regroup. It was too warm to leave it in the car, and too dangerous for the cocoon to drag it around in my shirt pocket, so I found a nearby tree and laid it on the ground nearby, out of sight. I came back a half-hour later and it had emerged!
Here he is, well-camouflaged near the base of the tree.