Maine Wetlands 2010 Assessing the Effect of Hydrologic Change on Sora and Virginia Rail Populations Ellen Robertson and Brian Olsen Maine (Penobscot and Washington Counties-May through August-2010) The goal of this expedition was to understand how future changes in hydrologic regimes from climate change will impact the breeding marsh birds of the Northeastern United States.  read more Maine Wetlands 2010 – Assessing the Effect of Hydrologic Change on Sora and Virginia Rail Populations