At about 50 metres, they'll start growling when you crawl up to them and then, if you stand up quickly, they'll run away. But there is almost no reason anyone needs to be crawling up to lions. I'm sure you'll agree that they are one of the easiest kills in the game. And easy money. Lions very rarely stalk you but if they do, you will hear them in plenty of time and a quick zig zag movement will cause them to miss their pounce, after which they'll flee. Wolves, buffalo and moose are more dangerous because they will keep on attacking you. If this game based their class designation on how dangerous an animal's mechanics are then lions would be a class 3. 😂
Okay, jokes aside, lions are a class 7, purely based on their mechanics when you consider how easy they are to kill.
The reason why they are class 9, and will remain as such, is because of a limited 'ethical' mechanics system that is attached to the bullet calibres. Many people will think that this system is perfectly fine. That's okay. I'll happily agree to disagree, without meaning to cause offence to anyone. The system is unlikely to change anyway which is why I keep stating that, at the end of the day, I'm not that fussed on this issue.