Diana Cormack, a PA Master Naturalist trainee, will be leading a walk to learn how to ID plants and trees in the late winter on trails around the Great Marsh. […]

Due to COVID we will keep the group small. If the group is to big we will split into smaller groups. Join local birding expert Mike Coulter as he guides […]

GMI Spring trail clean-up March 20-21, 2021 Please join us the weekend of March 20-21 to help get the trails cleaned up around the Great Marsh. Due to COVID we […]

Come join us at the Great Marsh for our monthly bird walks. The Great Marsh is a premier birding location in Chester County and to date has recorded over 185 […]

Come join Diana Cormack, a PA Master Naturalist trainee, on a nature walk around the Great Marsh. Bring binoculars if you have them to help ID the birds and bring […]

Come join Jim Moffett, a local photographer and naturalist, for a walk around the Great Marsh to learn about taking nature photography. We will keep this walk to 10 participants […]

Come join Diana Cormack, a PA Master Naturalist trainee, on a nature walk to learn more about the Great Marsh, an ancient periglacial marsh and the largest marsh in Southeastern […]

Come join us at The Great Marsh for our monthly bird walk on Sunday, May 17th at 7:00AM. The tail end of migration will still be happening and we have recorded […]

Come join us at The Great Marsh Institute on Sunday, June 13th at 8:00 AM for our next monthly bird walk. June brings the peak of breeding season to the area […]

Come join us at The Great Marsh Institute on Sunday, July 11th at 8:00 AM for our next monthly bird walk. July can be relatively silent but rest assured that […]

Come join us at The Great Marsh Institute on Sunday, August 15 at 8:00 AM for our monthly bird walk. Please RSVP to lori@greatmarshinstitute.org. This will help us to organize […]

Come join Diana Cormack, a PA Master Naturalist trainee, and walk in the Great Marsh to identify non-native introduced species, not necessarily just plants, and discuss their impact on this […]