Seen at Ruscom Shores Coservation Area, SW Ontario 10 Jun 2020. I was thinking Great Crested Flycatcher. I think I saw a flash of yellow on the belly but did not get a front view of this bird.
akandula, I am impressed with your memory. I can barely remember my own name at times and have no recollection of my previous posting. Unless I hear convincing arguments to the contrary I will record this as an Alder. Thank you.