Search the indicated location to find the corresponding item.

Black Mushrooms
Enter the first series of caves. During the day, there is an area with sunlight. Climb the vines on the wall in that section to find Black Mushrooms. They are used to make Deadly Poison, which can be used with arrows to instantly kill a deer. After they are picked, Black Mushrooms will grow back there very slowly.

Feathers
Shoot the birds in the Bamboo Grove or top ledge in the Western Beach area with a sling shot or a bow and arrow.

Supple Vines
There are two trees in the jungle area with Supple Vines. The first is in a raised area near the entrance from the beach where you found the medicine, and the other is near the exit where you build the small raft. Combine 2 Supple Vines to create a Supple Rope.

Wild Ox
Climb the ledges near the drinking hole. Enter the Craggy Place. Remain along the east edge, and go all the way south then to the west. Enter the narrow gap between the rocks leading north. Continue north until you reach an area that has a large square stone. Push the stone to the west. Climb up, then go all the way to the south. Jump over the gap to the east. Face north, and climb the ledge. Push the large stone on the north edge of the area. Climb up the ledge to the south. Find the large flat rock in this area, then return in the direction you came from. You will eventually encounter the Wild Ox.