Placeholder until I upload photos
Very tattered from overwintering as an adult. I did not see a distinguishing 'comma' field mark of a Gray Comma species.
When this bird flew by silently and fairly low to the ground over the lake, near the edge of the lake, I thought it looked like a mid-sized raptor or owl. Smaller than an eagle, but larger than a Cooper's hawk. Never saw its head/beak, but it appeared stubby and the body/wings seemed wide compared to the length of the bird. Sorry the photos are so poor....