The night started with the alert female on the bridge.   I took a long movie of her to document what the wake up process was like.

She flew off into the Loch when it got dark.  They both went off to the branches and trees near the cavity by the damaged rustic bridge.  They head rubbed, copulated and both spent time in the cavity.  I need to watch this cavity one night to see if the male is roosting in it and guarding it during the day.