I have had my fatties (Whites Tree Frog) for almost a year and I have never heard a peep out of them. I got a new Whites about 2 weeks ago and he croaked the whole drive home, and did not hesitat to croak the day after I put him in the quarintine tank! Now I think he just likes to say good night cause when I turn off all the lights and TV at night to turn in I usually get a few croaks and then silence the rest of the night!