That's how I got my lvl 56 4* bird. But, I've retried this method multiple times with no success. I've tried following the gems, essences, etc to no avail. The highest I've been able to get to since, is level 20 or so. I wish instead of doubling gems each time a pig was encountered, that it cost 50 or even 100 gems each time. That way unlucky players have a better chance it getting a high level bird. Home Forums > Angry Birds Forums > Angry Birds Evolution > General Eagle mountain- be very careful, it could run Don't forget that you can play the mountain . Cheats, hints, glitches, unlockables, guides, walkthroughs, hints and more for Angry Birds Evolution on Android. Submit some more!.