Eric our Eclectus parrot does not speak english, and has no need of it. If you don't share your toast he screeches at you! Very effective! He gets down on the floor and threatens any animal, dog or cat that doesn't know him.
He is totally unafraid and wins every encounter because he struts right up to them, displays his powerful beak then screams at them from about an inch away! At the same time, he pumps his wings at them like a huge fan, while exposing his talons!
Nobody messes with big Eric!He is 9 years old now, ( life expectancy at least 50 years) and he is very funny and smart.
He shows off like a teenager, and we have to use lock nuts on every bolt in his cage or he disassembles it for fun!
We have dogs, cats, fish even, and all of them seem smart to me. 