The King Vulture (Sarcoramphus papa, Urubu-rei) is one of the largest, colored and rarest members of the Cathartidae (vultures) family, it's about twice as big as common vultures. It's closest living relative is the Andean Condor (Vultur gryphus).
These birds are called kings because they very often displace other vultures when they find a carcass and these will wait for the king to finish feeding. Often they will make the initial cut of big carcasses.
They are fabulous gliders, often soaring for hours without beating their wings.
This one was found feeding on a cow's carcass (Bos indicus).