Oh hai! Read the description for quick links. Discuss in the forums. http://lickmyear.org/forum All hunting guides: http://goo.gl/nlXdO
First, we pick up the quest. Sorry I missed the marker itself, but I'm in exactly the place where you read the billboard when I look at the map. If it's not showing up, then you need to do a Wanted:Dead Quest from the nearby Outpost.
Then, Heron Relic 22, which is right near the bow drop for the quest.
Then, the stalking. Tag the leopard and the black panther, and try to get them from range. Don't forget to use Deadly Hunter syringe for extra damages.
Quest pickup: 0:00 Heron Relic: 0:30 (map after pickup at 0:42) Stalking the prey: 0:55