This pair of eagles was initially in two separate trees and I has happily snapping pictures of the male alone (head down in this pic). Apparently the female wanted to get into the picture and flew over to join her mate.
Upon her arrival she became very, very vocal and the male held its head down, seemingly demurring to the female. The entire series of pics from that day is in my top three favorites that I have ever taken of these majestic raptors.