Forgot to mention--unlike the millipedes I've seen before, which coil up if disturbed, this one did not, when nudged gently with a twig...it crawled right up onto the twig which let me move it from its perilous location on the rock. I had tried to make it a bridge to the iris stems, but it wouldn't climb onto the flake of limestone I used. It did take to the twig, however.