When Little Rosemary was rescued, she weighed only 2.63 grams and was a tiny, late-born, injured, sticky-winged, and mite-infested pup. As she grew, the small tear in her wing membrane became a 1cm hole, the little white patch, located to the right of her fifth finger.
On August 15th, I was pleased to see that the membrane had started to repair itself and two nights ago, when completely healed, I tested her in a small puppy playpen – it took eight attempts, and she flew briefly. As the weather had warmed up, I took her to the bat flight last night and as the fresh air and tooting owls were all new to her, she was understandably apprehensive.
During her flight, she landed softly on the carpet twice, but to my delight, she eventually managed to fly from one side of the flight to the other. 
I couldn’t have been more pleased for her. 
However, she now needs to build muscle strength and learn to manoeuvre, but I am confident that she will make it. The healing powers of our amazing little batties never cease to amaze me.