Laughter erupts in the bevy of swans

I suppose it sort of looks like the swans are laughing but they are doing anything but. These Tundra Swans erupted in a spasm of cries over what I have no idea, but they are all engaged and it wasn't friendly. In addition two of the swans have their wings raised in what might be an aggressive, intimidating style. This I captured on the larger lake at the Chesapeake Bay Environmental Center.

 

Captured 9 March 2016.

Done