The bird answers to just about anything ending with an 'ee' sound, including my sister's nickname. And occasionally, they both answer at the same time, or to each other's names. Baby, coffee, toffee, luffy, dummy, happy, sleepy, grumpy, dopey.. I suppose it's not his fault. When such extreme adoration is so often expressed loudly from the other end of the house, it must all sound the same. And he doesn't even understand human. Probably.