They were nearly hunted to extinction in the early 20th Century, but today the largest waterfowl species in the world is once again thriving in the Sandhills - the trumpeter swan. Meet the researchers who worked tirelessly to protect these magnificent birds and their habitat, the ranchers who coexist on the land with them, and a photographer whose love for this species emanates through his breathtaking images.

Photographs courtesy of Michael Forsberg/PBT.