You want to buy an umbrella cockatoo will it kill your African grey?

Birds of different species should not be housed in the same cage. The difference in size between an umbrella cockatoo and an African grey is such that if the cockatoo were to become annoyed and bite the grey, it could cause serious damage, such as removal of the entire beak, being common. While people have kept these birds together before successfully, it should be entered into with great caution. Your best bet is to keep these animals in separate cages and give them individual times out of the cage.