The secretary bird kills cobras with a kick that lands in just 15 milliseconds. This film breaks down the science behind its 195-newton stomp — five times its body weight — captured at 500 frames per second in a 2012 England experiment. It follows Sagittarius serpentarius across its African grasslands, a four-foot raptor that walks 30 kilometers a day, and reveals why habitat loss has pushed this specialist from vulnerable to endangered.