Whale watchers in Madeira captured the astonishing moment orcas took down a pygmy sperm whale. According to newly published research, they may have documented the first known instance of orcas hunting a marine mammal in Madeira, a Portuguese island territory. The remarkable sighting gives scientists a new example of orcas’ complex predator behavior and raises concerns that they might prey on some of the region’s endangered marine mammals. Learn more about what this discovery could mean for Madei