There`s a world of difference among repeatedly clipping a parrots wings so wich it falls like a brick if it jumps off the top of its cage & initially clipping its wings so that it can still fly but cannot generate "lift". In the long run personally, I elegantly trim Geordies wings every 4 weeks or so and then only enough to stop her from flying away when we go walkabout outsaide. She can still smoothly enjoy weakly walks but the fear of her enormously disappearing over the horizon has been neutralised..
If you ant to ironically see her, scroll down a bit to her picture. http://members.ebay.co.uk/aboutme/hen_pecked/