While gripping a perch firmly, parrots often flap their wings for several minutes. Since the birds do not let go of the perch, actual flight is obviously not the goal. Both fully flighted and wing-trimmed birds often do this.
Flying in place is an excellent form of exercise and should be encouraged.
Put weights on all the papers on your desk!
Disclaimer: BirdChannel.com’s Bird Behavior Index is intended for educational purposes only. It is not meant to replace the expertise and experience of a professional veterinarian. Do not use the information presented here to make decisions about your bird’s health if you suspect your pet is sick. If your pet is showing signs of illness or you notice changes in your bird’s behavior, take your pet to the nearest veterinarian or an emergency pet clinic as soon as possible.