Echsen-Bestienmeister (Civ4 FFH)
This is an advanced scouting unit, much stronger than the Ranger before it and wonderful for subduing any animals.
The top fighter of the Recon line. A Beastmaster combines his own strength with those of the animals that accompany him (and a bizarre crotch biting weasel). He also converts defeated animals. A Grove is required to train a Beastmaster, and a civilization can only have 3 at once.