The Tongue of the Beasts is the Kekkei Genkai of the Natoro Clan which enables every member to communicate with any beast of any species either mentally or verbally. While it is possible to establish a mental link with animals to communicate silently using the Tongue, either a close bond must exist or the animal must initiate the communication and due to this every clan member forms a close bond with their "animal of preference" in order to make mental communication possible.