January 29 Incubation?

I observed a subtle change of behavior at the nest late this afternoon. I was never able to observe the female but the male was quite active and when he flew in, he landed and perched precariously on the side of the nest. After several minutes of peering into the nest, he flew to a tree overlooking the street, where he attracted a lot of human attention, even stopping traffic. He left after a few minutes, and I was able to relocate him on the North Landing River. So, it is possible that egg laying/incubation has begun. Sorry, I can't be more definitive as I prefer that Reese Lukei makes that pronouncement.