Rogue Robin

On a lazy morning a few weeks back, I heard the occasional thump, thump, thump coming from the hall or dining room. I recognized it from previous springs. So, I got up to see if  I could get a glimpse of the culprit. To my surprise, it wasn't Kamikaze Kardinal. It was his buddy, Rogue Robin. Take a look at the picture. The window is very dirty from all his slobber.