I was there early this morning (just before 7 am) and heard and saw the Fish Crows (I'm pretty sure I heard two different Fish Crows) flying around trying to chase off a group of American Crows. The difference in calls were clearly heard. Most of the time they were flying around, just landing briefly in a tree near where I stood on the south side of Lakeshore. They never visited their nest.
I just read on Ontbirds that a possible Fish Crow was found dead (as a result of this battle with the Am. Crows?) and that the nest seemed abandoned :cry: