Fractures in the upper part of the leg are best seen by an expert. Extend the leg and wrap it in wadding to protect the skin from pressure. Cut a straw to a length that is shorter than the wadding so the sharp ends do not cut the skin. Slit the straw lengthwise, fit it over the wadding then cover with adhesive bandage. Leave in place for 2-3 weeks, longer if necessary.
Birds bones are hollow and very frail.
Fractures near joints do not mend well, and compound or multiple fractures need experienced attention. The diagram below shows how a clean break to a wing can be treated. Fold the fractured wing into it's natural position. A figure of 8 bandage holds a broken wing in place then another bandage is wrapped over the damaged wing, around the body then under the sound wing. Leave for about a month.