Rabbit

Rabbit (AKA Bunny) is a passive mob that may possibly be added in Update 0.12.0. They are harmless creatures that rarely drop a Rabbit's Foot.

Spawn
Rabbits can spawn in most biomes, including plains, extreme hills, savanna, swamp, taiga, etc. They spawn in groups of 3-4.

Behaviour
Rabbits hop around aimlessly, and will find and destroy any mature Carrot crops. They will follow the player if they hold Carrots, Golden Carrots, or Dandelions, and can be bred using the aforementioned.

Rabbits will run away from Wild Wolves, and the latter will attempt to chase them down and kill them. Tamed Wolves, however will not do so.

Trivia

 * There is a hostile version of Rabbits called the Killer Bunny. However, it is unknown if it will be added.
 * There is a variant of Rabbits called 'Toast'.
 * This rabbit is the skin of user xyZenTV's girlfriend's missing rabbit, which Ryan Holtz implemented as a memorial.