While it has been proven that birds like parrots and cockatoos understand the difference between human words and mere noises they still don't understand why humans feel the need to mess with their heads.
And yet Onni the cockatoo seems to genuinely enjoy having his human Chet mess with his mind by making all kinds of strange noises with his mouth, noises that totally blow little Onni's mind.
The duo have a strange yet extremely endearing relationship, which mom Rebecca Stout captures on video, and I'm pretty sure Onni thinks Chet is a bird too- a large, hideously deformed bird with no feathers whose beak fell off, but a bird nevertheless.
-Via Laughing Squid