In need of a little help

When I was at the Calgary Zoo on 6 October 2012, one of the workers in the butterfly room was wearing this cast (?), on which this beautiful butterfly rested. The young man said that the insect was not doing very well and he was trying to move it to a bowl of fruit. However, the butterfly really didn't want to leave this new kind of perch that it had found : ) Eventually, there was success - so I do hope it sucked up some new energy and survived. I couldn't miss an opportunity for a different kind of shot, of course. I think they say that having a butterfly land on you is good luck, so hopefully this man's arm will heal extra fast. Not sure, but I think this butterfly is a Scarlet Swallowtail / Papilio rumanzovia.

Thanks, Art (Leapfrog!) for the ID confirmation - much appreciated, as always!