After Peter was calling for the birds outside your house, Kiwi and Kirby started calling for Peter, then Louie heard and thought they were calling for him, so he started calling, and we were all just a bird calling mess! lol! And Peter looks EXACTLY like Louie! Right shade of blue and everything! Except Louie has stripes all the way down to his beak and Peter doesn't. Is he full grown yet?
And you should probably take the sand perch out, it's not good for their feet.