A little while ago a robin sat outside my window for five minutes straight and allowed me to sketch him in my notebook. Later a series of convergent events all suggested that I draw Robin as a robin, and so I did using the initial sketch and some nature pictures as reference. Really, I can't claim to understand what goes on in my head. Stuff just happens up there and sometimes it gets drawn. I'm sure this joke has been done a hundred times before though. Robin the boy wonder from the Batman comics is copyright to DC comics of course, robins are copyright to nature.