Skeleton

Skeletons are hostile mobs that shoot arrows with a bow. The skeleton was implemented into the game in 0.3.3. Skeletons take damage upon coming in sunlight, like zombies do.

Offense
Skeletons attack the player by shooting arrows from a 16 block range. Their arrows can deal upto two hearts each, although this is lessened when the player wears armor.

Combat
When fighting skeletons, the best strategy is to use a Bow, as it is very hard to attack skeletons using a sword. However, if using a high tier sword like Iron or Diamond, melee can be considered an option.

When using a sword, it is best to take shelter behind blocks or Trees.

Defense
As of the 0.12.1, They have upgraded AI as they move to any covered spots to avoid sunlight form burning them. They are usually found on trees or/and and structure that gives protection from sunlight.

Trivia

 * They are one of four mobs (the other three being Zombies, Zombie Pigmen, and Wither Skeletons) to hold an item.
 * Skeletons do not burn in sunlight if they are in water or in shade.
 * Some players are occasionally shot from behind by a Skeleton in the night, giving Skeletons an element of surprise.
 * Occasionally, a Skeleton's arrows hit other mobs. This causes them to attack each other.
 * Unlike Zombies, some Skeletons survive daylight by staying under a tree.
 * When moving or being attacked they make a 'clunking' noise a bit like rattling bones.