"Parent-rearing keeps the pairs occupied for weeks or months, according to the species. They need the occupation. Rearing reduces the monotony of the days and weeks and years which have little to distinguish them. Boredom and lack of stimulation is a very real problem for the more intelligent species. Many s enjoy family life and most "owners" obtain a lot of enjoyment from seeing family groups in an . (And I do mean an aviary and not a little suspended cage where close confinement can result in aggressive encounters.)"