What do little birdies see when they get knocked unconscious?

Ever noticed how Tweety Bird is the source of others getting knocked unconscious? Ever notice how Heckle and Jeckyle will gladly knock some one unconscious but they themselves have never been knocked unconscious. Ever notice how Big Bird is really pretensious? These birds are huge stars adored by millions but they themselves are incapable of seeing stars because of their highly elaborate cone cells. Birds can see colors but they can't see stars when knocked unconscious. Of course, that Big Bird is really scary looking and I wouldn't want to test this theory on him.