Head to the northwest of Jacob’s region, Whitetail mountain, where you will find Bo Adams who is standing in front of a cave.
You have to talk to him to unlock the Nature Provides side quest, follow the quest to see the target locations on the map.
Here, a chopper is a suitable option to reach your target locations quickly and easily.
The first target is further to the west, the Snowshoe Lake, where you have to pick the Leviathan bones under water.
If you have collected the Leviathan bonus, then for the next target you have to reach the mountain pass.
Here you cannot use the helicopter you have to climb up with the help of the climbing hook.
Once at the top you have to collect the eagle feather. Then return to Bo to get your rewards, $ 800 and Ultimate Hunter.