It was the sound of an eagle which brought me to down to where these two were perched. Perhaps, not the "song" of the little songbirds but definitely a wonderful (and somewhat chilling) call.
Having had an opportunity to more closely view the two, it appears the one on the right is the female (and larger). She still has the final vestiges of a dark face mask and probably has only recently developed all her adult feathering. And yes, it was the female eagle screaming to the male.
They sat for almost 40 minutes and during that time the cloud cover went from dense to sunlit from behind the clouds. The first photo was taken after the clouds had thinned out and changed the tone from dramatic to soft.
Eventually, they flew off, one after the other perhaps to find a better "haunt" for a meal.