Bone

Bones are items.

Natural generation
Bones can be found in chests hidden in desert temples and jungle temples.

Mobs
Skeletons and Wither Skeletons drop 0–2 bones upon death.

Fishing
Bones can also be obtained by fishing as part of the junk category. The best chance of catching a bone is achieved without the Lure or Luck of the Sea enchantments, yielding a 1.2% chance.

Usage
Using a bone on a wild wolf has a 1/3 chance of taming it. Bones cannot tame an angry wolf or a wolf that someone else has already tamed.

Trivia

 * As with Sticks and Blaze Rods, Bones are wielded as a tool instead of an item.
 * The bone appears to be the femur, the humerus, or the tibia of a human, however is more likely to be the femur, because the humerus and tibia are slightly curved (although there are no curves in Minecraft).