Race to Save the World's Rarest Bird

"Thirty years ago, researchers discovered a previously unknown species of bird in the lush and remote mountains of Hawaii. As they studied the creature - which sported a black mask and was named the po'ouli - they soon learned that its population was rapidly diminishing, and they worked frantically to find out what was killing the species and how they might prevent its extinction. What they found was an intricate web of factors, including warming temperatures, habitat change, susceptibility to disease, wild pigs, m…