Federal officials arrested the killers of two rare whooping crane in Kentucky . CNN 's Joe Sterling contributed to this report . The birds are thought to have been shot in the same incident in Tennessee . A reward is offered for information leading to those responsible for the crime . Whooping crane are the most endangered of all of the world 's crane species .
Federal officials arrested the killers of two rare whooping crane in Kentucky . The birds are thought to have been shot in the same incident in Tennessee . A reward is offered for information leading to those responsible for the crime . Whooping crane are the most endangered of all of the world 's crane species .