Update from the owner: another great composite.
Here is a composite photo of the owls seen in the slot box. There is a strong resemblance to the pair that mated last year. I have seen the ‘male’ more frequently than the ‘white-face’ ‘female’. However I have heard the ‘male’ calling at dawn, which suggests to me that the ‘female’ isn’t very far away. In fact I believe I have heard two owls calling, but couldn’t confirm the source of the second sound.