Both genders are generally whistlers, able to learn simple songs. Cockatiels originate in Australia. They are not limited to a specific region and habitate most of the continent. They are characterized by the crest on the tops of their heads that is a good indicator of the emotions of the bird. Their life span is anywhere from 10-25 years, depending on factors such as diet and overall health.
Cockatiels are relatively inexpensive.
They are intelligent birds and easy to train. As with any bird, the key is consistency. Cages must be cleaned often and thoroughly. Cockatiels come in a beautiful array of colors, or mutation. Definately research the many possibilities before making your decision.