Hay Slough Time-lapse Video 2011 Photo Credits: Chas Jones No flash player has been set up. Please select a player to play Flash videos. Video not playing? Update your browser or download the video clip This time-lapse video shows how conditions at the Hay Slough study site changed through the 2011 winter to spring season. It shows how conditions can change very rapidly. Process Observed: Open WaterBeavers Date Process Observed: Wednesday, March 30, 2011 to Wednesday, May 11, 2011 Galleries: Hay Slough Gallery