Grif hasn't made any call sounds yet. He mostly does a clicking or popping sound with his throat when we talk to him. One time I was wipping some dirt away from his eye and he growled at me. It was funny. That's the only aggressive noise he's ever made twards me though. He's really nice and doesn't bite at all. I guess maybe his conditions aren't right for calling or maybe he's to young I'm not sure. He does make a cheep sound every now and then. I've had him for about 6 months. I do keep a heat gradient so hopefully ill get a responce soon.