Friends, this is Trumpeter Swan 47E and i think he/she woke up cranky.  As these swans were settling into their nightly roost, there was lots of chasing and jostling to vie for space.  After about ten minutes of this activity all were quietly preening and tolerating the presence of others.  Not your typical swan image but tells of behavior not often shown, I love the feathering on the underside of the wing, til Tomorrow MJ