My wife secretly filmed me today while I was checking the Rookery from St.Andrew's lane Lewes.
I thought she was just chatting to me Haha! Here it is.
I'm not sure if both male and female Rooks share incubation duties but if you see one standing on the side of the nest for long periods, you can be sure the partner is sitting on eggs with just head and tail visible* if you can get level with them.
*(I can only add a video here. I will add an image I want to show you in a second blog after this one.)