Hudson and I came across this beautiful creature on the side of the road while coming back from our morning walk. The wingspan is 6 to 7 inches across and the body is at least two inches long. It took some coaxing to get him onto a stick and out of harms way.
Before I had a chance to do my own research, I checked in on Jim McCormick's blog and, to my surprise, his post today is on this moth. He's more of an expert than I, so please read his posting for more details - and photos that better capture the intense coloration.