Cockatiels are one of the most common parrots in captivity and actually belong to the same family as the cockatoo. Hand-raised cockatiels can be quite personable and gentle. Although they can speak, they more typically whistle and chatter. Cockatiels need a lot more care to stay healthy than most people expect. Cockatiels need balanced diets (not just seeds), spacious cages with different heights of perches and different diameter perches, access to direct sunshine, and regular baths to stay in peak condition.