Birds in flight, migrating north in the spring and south in the fall. It is glorious to behold, with no special effects, but breathtaking shots achieved with mini-helicopters and hot air balloons. Cranes moments before landing, with their legs outstretched and flailing; penguins swimming enmasse, like salmon going upstream to mate. Geese geese geese. Other birds I don’t remember. A visual treat, with minor voiceover and subtitles detailing bird names and migration lengths.