The Alpha Stag

The Alpha Stag is an epic and rare beast. It is bigger than all other Deer in the game, endures a lot more damage and he is faster than other deer. It is, therefore, easier to lose him during a chase. He is easily mistaken for a regular brown deer if it's hard to spot the size-difference between the two.

The Alpha, contrary to its subjective relatives, do not make an appearance unless the player lures it out with Deer Scent. There is a bigger chance of making a Scent-Lured Deer appear instead of the Alpha. There is a book named Hunting The Alpha found inside Hunting Shacks that explains how to best find and hunt him down.

Source

 * Hunting The Alpha
 * Deer Scent

Drops

 * Deer Guts (common)
 * Deer Antlers (common)
 * Deer Meat (common)
 * Giant Deer Pelt (common)
 * Pristine Giant Deer Pelt (uncommon)
 * Perfect Giant Deer Pelt (rare)

Trivia

 * The Hunter's arrows and Ancient Shard arrows can be quite useful to hunt the Alpha Stag.
 * Killing the Alpha Stag for the first time lets you achieve the "Oh Deer" Steam achievement.