Around 10pm we noticed spidy keeping Boom cam company but lost track of it when fog descended. Early morning screeches & deets heard close by. Flyby over the Kastle 4:15am. Syd dropped out of the air landing on the roof 5:35. Seconds later Mel hovered over then flew off. She flew to her tree spot 5:36 then left 5:41. Screech heard 5:51 followed by Syd in her tree 5:55.