I saw an enourmous one of these earlier in the summer, but it was green - perhaps they change colour as the weeks pass and it prepares to form it's cocoon? I was amazed at the size of it's droppings!!
anchan, according to Ebi-kuns bug book the green ones are a type of butterfly, quite pretty too.
I loooove comments, so thank you for taking the time to leave one.If you put your email address in the box provided I can answer your questions directly too, I hate spam so don't expect to get any from me, corned beef on the other hand....jo