Owl? Nightingale?

"The German infantry assault is scheduled to begin at 9:45. Three quarters of an hour before that, Richthofen plans to take off with his personal squadron, 11. He has reserved the main combat period of the day, which is expected to be the most intense three quarters of an hour. As day breaks, the fighter pilots stand ready, dressed, disheartened, disappointed and angry at the airfield, staring into a thick, grey, damp wall of fog. It is impossible to fly. ‘One man's loss is another man's gain!’ says the cavalry captain."