Caw Caw

If I ask Jude what a dog says, he makes a little "woof woof" noise, in fact he makes this noise anytime we see a dog or any other furry animal (squirrels, rabbits, etc.). If I ask Jude what an elephant says he will raise his arm like a trunk and make a elephant squeal. If I ask Jude what a bird says he will loudly call out "caw caw" like a crow. In fact, he makes this noise any time he sees any bird - seagull, mourning dove, cardinal, chickadee, grackle, well you get the idea. I have tried getting him to coo coo, or tweet tweet, but no...its caw caw all the way.