I watched as this giant green caterpillar traveled across the garden in late September.  While it was making its way across a dead branch lying in its path,   I went inside for my camera.  I found it again at the very top, with nowhere else to go and helped him get safely back on the ground to continue on his journey to become a giant Polyphemus Moth in the spring.

I found some fabulous photos of the metamorphosis of this caterpillar into a Polyphemus Moth here at whatsthatbug.com .