MANILA(AFP):   Wildlife authorities said Saturday they are investigating the death of a rare Philippine eagle, one of the world’s largest and most endangered raptors, shortly after it was captured by a local resident. The carcass of the giant bird, belonging to a species that is threatened with extinction, was recovered from a resident of Gingoog city on the southern island of Mindanao, the Philippine Eagle Foundation said. It had only been released into the wild by conservationists two months earlier.  “Minalwang (the name given to the bird by the foundation) was captured.