Having the hump

This is one of my garden robins letting me know he is not pleased because I had the temerity to go away for a few days, leaving him without copious hand outs at the soup kitchen that is my bird table!
Whilst he is putting on "sad and dejected" he would--in a heartbeat---transform into raging ,rough ,tough bully,should another robin so much as poke a toe out fof the bushes!