Actually, my experience with asiatics has been that they often react very negatively to clipping, often becoming biters and/or screamers, pluckers, etc if their first clip is not handled properly. Of course most people just clip the feathers to the length they want them all at once. I however encourage people to clip only one feather at a time on each wing (so that the wings are always even) every few days to give the bird time to adjust to the first clip.
Losing the ability to fly rocks the world of a baby bird. Imagine if your only means of safety and transportation was suddenly removed without warning or explanation, and your own body no longer did what you needed it to. Wouldn't that stress you out? Especially if it happened to you as a child?
Your bird is traumatized, stressed, and unsure about safety. Chattering/talking is something that COMFORTABLE birds do when they are relaxed. It will take some time (perhaps many months, perhaps only a few days ) for your bird to recover from this shock and feel safe and comfortable again.
I'm not saying clipping is always wrong, but I first clip handled incorrectly can be devastating. In the mean time your bird needs lots of love and encouragement and stability in his life to help him regain his confidence.
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