Beast Language

Beast Language was a Force ability that allowed a user to speak with one type of creature in a language that it could understand, allowing both the handler and the animal to communicate and exchange information. This was an ability that wasn't normally found among many Jedi, but was more likely to be used by a wild Force user such as a Beastwarden, or one of the Witches of Dathimor (who may have used such an ability to communicate with their rancors). This ability couldn't be used to communicate with creatures that don't normally communicate (such as microbes).

Source

 * Ultimate Alien Anthology