 Morphological studies on Anna's hummingbird kidneys showed adaptations of high capillary density in close proximity to nephrons, allowing for precise regulation of water and electrolytes.During turbulent airflow conditions created experimentally in a wind tunnel, hummingbirds exhibit stable head positions and orientation when they hover at a feeder.When wind gusts from the side, hummingbirds compensate by increasing wing-stroke amplitude and stroke plane angle, and by varying these parameters asymmetrically between the wings and from one stroke to the next.