Thanks fellas for the varied and interesting information, although after reading some of the exchanges between members, it seems that I may have unwittingly kicked over a hornets' nest. It would appear however, that the general consensus would be that the idea I had of overheating these nests to "cook" the occupants using a hand-held laser at a distance, is a little too ambitious.
So it's back to the drawing board.
So it's back to the drawing board.