Maybe the lion case is also a "social effect" since a male lion is either completely alone or he is the leader of a pack of not so few females + cubs. I suppos

Maybe the lion case is also a "social effect" since a male lion is either completely alone or he is the leader of a pack of not so few females + cubs. I suppose the lone lions hunt for themselves (and you probably didn't count those) while the leader of a pack doesn't need to because he is the respected, well, leader.