Denizen

The Denizen is an enemy added in Black Ops II, and only appears in the Green Run map. It only spawns in the fog between locations, and does not yield any points for being killed. Killing a Denizen does not drop a power up either.

Call of Duty: Black Ops II
The Denizens have low health, and can be killed before they leap on a player. Their health when leaping does scale with that of the Zombies, at the same rate. When attached, the Denizen takes five melees before it lets go, however it will be reduced to two hits with the Galvaknuckles or three with the Bowie knife. If a Denizen leaps on a player, they will inflict damage until killed. They can be killed by either another player shooting it or by hitting the melee button. A player with a Denizen mounted on them can still walk and evade zombies. Once jumped upon, the player will move slower, and Stamin-Up's effect does not apply.

Behavior
If a player steps out into the fog between bus stops, a Denizen will emerge from the ground, and start shrieking. They don't have an infinite range to leap on a player, and will attempt to run after the player before getting in range to jump on them. It has been noted that a Denizen will run back into the dust if the player returns to the clear air around the bus stops. Denizens will not go after monkey bombs. If a player with a Denizen latched onto their head runs under a green streetlight, the Denizen will jump off the player, and a portal will appear under the streetlight. The player can then enter the portal and end up in a random location on the map.

Achievements/Trophies
Fuel Efficient (10 / Bronze Trophy ) - In TranZit, use an alternative mode of transportation.

I Don't Think They Exist (10 / Bronze Trophy ) - In TranZit, kill one of the denizens of the forest while it is latched onto you.

Trivia

 * If a player has a Denizen latched onto them, they cannot revive other players.