Wildlife officials seek the killers of two rare whooping cranes in Kentucky . The birds were shot and killed by a hunter who mistook them for another species that he thought was more dangerous. CNN 's Joe Sterling contributed to this report . A reward is offered for information leading to those responsible for the crime . Whooping cranes are the most endangered of all of the world 's crane species .
Wildlife officials seek the killers of two rare whooping cranes in Kentucky . The birds were shot and killed by a hunter who mistook them for another species that he thought was more dangerous. A reward is offered for information leading to those responsible for the crime . Whooping cranes are the most endangered of all of the world 's crane species .