This article has helped many people prevent and solve the problems involved in excessive screaming. If they are housed together, two parrots who form a bond with each other will be harder to keep tame to people. Parrots are not like dogs who will play together all day and then wag their tails in happiness to see you. It is more difficult to keep two parrots tame when they keep each other company. It can be done but it will require you to pay more attention to each bird individually and also for you to interact with them together.
Parrots can keep each other company without being housed in the same cage.
My African grey, Bongo Marie and my caique, Spikey Le Bec, do not physically interact with each other at all. If you have the affection, time and energy to give more than one parrot, then it would work for you to have two birds to keep you company - not necessarily to keep each other company. If you are getting another parrot because you think it will make life with one parrot easier, you will most likely be disappointed. Please refer to the Pet Bird Report Back Issue Lists for specific articles which will help you with your parrot.