Nature has mastered many such things long LONG before mankind. Examining fish scales to determine more efficient swimming gear or the creation of more resistant body armor... It seems even the Egyptians may have understood flight as evidenced by the wooden bird carving discovered. Which doesn't exactly surprise me considering if you make enough observations you maybe able to emulate something.

Very cool link and the study should offer further endurance for UAV flights.

Nature has not mastered anything. Nature IS everything.

It is man who struggles to master what nature already is.