My grey has never had the opportunity to fly. Clipped as a baby when I bought him, he began to molt out his clipped flight feathers and one by one he chewed them off as they got long enough to extend past the other wing feathers. I've heard that you can put plastic ornamental things that stick to the glass on your windows until the bird learns about glass. You can sometimes find them at the dollar store or Walmart. I used to feel that the birds were safer clipped, but after reading all the pros and cons, and after watching Tobie crash to the floor many times, I think it is good for birds to be flighted for a while at least.