The World’s Smallest Mammals: Baluchistan Pygmy Jerboa
Tied in first place with the African Pygmy Mouse for smallest rodent in the world, the Baluchistan Pygmy Jerboa looks like a furry face with a tail and legs.
http://www.youtube.com/watch?v=-GKWOml84n8
Only living in the shifting sand dune desert of Pakistan, the Pigmy Jerboa can also alter its metabolism, which it does on a daily basis, slowing down its breathing and circulation to make up for a barely nutritious diet of succulents, windblown seeds and any other digestible vegetation.