Skeleton: A staple in role-playing games, skeletons in Minecraft have the ability to shoot arrows. This is one good reason to place glass in your dwelling's windows, since glass cannot be shattered by the projectiles. Defeated skeletons drop arrows and bones that can be picked up and added to your inventory.
Bones can be used in crafting to create bone meal for farming, while arrows can be fired as projectiles once you create a bow. One of the more amusing things about skeletons is that they can anger other enemies if they hit them with their arrows, which can be used to your advantage if you find yourself overwhelmed.