Where did summer go?

I frequently walk some extensive wetlands that are home to hundreds of birds, many migratory.  And already one can sense the gathering energy as the migratory birds begin to prepare for their flight south.  Large groups of geese move slowly back and fore across the lakes, Lapwings flock and fly at apparently the slightest reason. The nights are beginning to draw in, the night temperature falling, and Autumn is drawing nigh.

But so soon!