As mentioned above, Cockatiels are docile birds well-known for their social behavior and passive nature. They need a companion, either another bird or their owner. That means you shouldn't have problems housing your cockatiel with other small bird species. There's no way to tell beforehand what type of bird your cockatiel will get along with, but a few varieties are commonly successful with cockatiels. Birds such as budgerigars, red-crowned parakeets, turquoise, scarlet-chested zebra finches, princess parrots, king parrots, and Bourke parrots pair well with cockatiels. In the same aviary, cockatiels can live peacefully with these birds (as long as they don't breed). However, some experts recommend against keeping parakeets and cockatiels together because of their size differences. Budgies can also make good companions for cockatiels. Budgies and cockatiels are native to the same region in Australia; therefore, they may get along well. Avoid house cockatiels with lovebirds, canaries, or larger birds such as larger parrots. It is not advisable to keep cockatiels and lovebirds together because lovebirds can be very aggressive while cockatiels tend to be more passive. While Cockatiels live alone, they are very social creatures. They will need extra human attention if they don't live with another bird. Cockatiel owners should remember that if they decide to get a companion for their pet, their pet may become less bonded to them and more bonded to the other bird.