Yes Liz I'm with you. I find it odd that they haven't shown up at all since the first 2 days when they were buzzing the box especially now that the ravens have been gone. I'd have at least expected dad to come in and do some scraping or to see Radisson there cleaning up (ok maybe her cleaning is a stretch!) because at all the other sites we've observed they did just that. In fact at some they fought pretty badly over it. I know they aren't ready to nest but they usually show up for a few minutes to stake their claim at least, do a little victory dance maybe.
I wonder if Radisson having only been here 1 season might be inclined to nest elsewhere, I know Bev did mention there were other places nearby she could see them using? Perhaps she is not so keen on coming back now. Perhaps being born on the ledge herself, she might find a ledge appealing herself.
