Animal Languages (3.5e Variant Rule)
From D&D Wiki
 What Are Animal Languages?
Animal languages are languages spoken by creatures with the animal sub-type. They represent natural sounds as well as intelligent communication. These languages CAN NOT be learned by a humanoid unless the creature can naturally speak them or has the class ability "Wild Empathy" (In which case they cost 2 skill points normally a piece)
 The Languages
This is the natural language for humanoid felines and intelligent felines. It is spoken through a series of hisses, meows, and sometimes a snarl.
 Feral Feline
This is a natural language for Lionfolk and intelligent large felines such as lions. It is spoken through feline growls and roars.
This is the natural language for humanoid canines and intelligent canines. It is spoken through a series of barks and growls.
This is the natural language of humanoid avians and intelligent avians. It is spoken through a series of clucks, shreaks, and chirps.
This is the natural language for humanoid night avians and intelligent night avians. It is spoken similarly to Haliaeetus, but there are mostly only clicking sounds.