Reg - thank you. There have been reports of up to I believe 10 egrets at the marsh, with some still hanging out in the trees. While I was there I could only spot them in the water, and there was conversation that many had migrated. Perhaps they simply flew over to the Duffins marsh??
Meghan - not sure where you're located, but simply head south from the 401 to Lawrence Ave. and go as far east as you can, it will lead you to the entrance of the park. From there, go down the hill and park on right where the first parallel spots are to the road and just hop up onto the boardwalk. It's very small, but you get an overall view of the marsh with egrets, herons, cormorants, etc, in front of you and a potential sora behind you.
Cheers to all, hope this helps.