The Great Blue Herons are known to constantly bring branches and sticks back to the nest during breeding season.  Eggs are known to be laid as early as April 15th in Massachusetts.  Both sexes incubate and share duties.  According to the Mass Breeding Bird Atlas, nest relief is accompanied by presentation of sticks and other rituals.  This is quite a stick being brought to nest located at Methuen Heron rookery!

4 photos posted:  http://www.pbase.com/birdshots/image/149752855   Click “next” in upper right corner to advance frames…enjoy!