Lisa, great pics. I've been wondering if the Hatchery pair would keep tabs on N1 and it looks like they are, at least sorta-kinda.
I saw the same as you on the rewind just now. But that branch is not "The Y," which is on the other (left) side of N1. This Y-shaped branch is flatter and it overlooks the pasture and bridge side of N1. Hope that the mating in the treetops means there will be eggs and eaglets soon!!