There is a grindcore band whose lead vocalist is an African Grey Parrot. May I introduce: HATEBEAK

Hatebeak - Bird Seeds of Vengeance from the split CD with Caninus "Hatebeak / Caninus"
There are no intelligible lyrics, the vocals are that of an African Grey parrot doing senseless death-squawking.

"The world's only death metal band with an avian vocalist." They have a bird as a death metal vocalist, which is a first in its genre.