Incubation last twenty-three days and both parents brood. The young leave the nest approximately four weeks after hatching. At six months the young males acquire the bright yellow facial markings. Their barred tails are retained until their first complete molt. They reach sexual maturity at eight to ten months.
Cockatiels are common in the wild and have been domesticated for the pet trade.
In the wild, Cockatiels are known to be pests because of the large flocks that feed on crops. Washington DC, 1983. Peterson, Roger Tory. West Germany, 1991. This information submitted as an assignment for Zoology 101 at Leeward Community College.