We are reposting our observation since my son did not know that he could not post a side by side comparison photo from allaboutbirds.com to help everyone with the identification. That comparison photo was flagged as copyright infringement. So we have removed it and are reposting.
American Red Squirrel (Tamiasciurus hudsonicus), heron pond, Huntclub trail, Jack Pine, Nepean, Ottawa, ON, Mar 10/22