Directly ahead was a broad meadow, angled toward the sun, that she knew to be an excellent source of power. As she drew close enough for the lidars to read the air, and for her eyes to pick out the movements of the birds, she banked into the thermal. Her first approach was a crude guess based on what she was hearing, but as soon as she got into it and felt the fine-grained currents of the air in her arms and her fingertips, she was able to use it as birds did.