Drawing a realistic parrot

How to draw a 3D realistic parrot with mixed media on gray paper. 3D drawing of a blue-and-gold macaw by Marcello Barenghi http://www.marcellobarenghi.com
➜ MUSIC: by Kirill Khursey please feel free to visit http://www.khursey.com
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➜ MY DRAWING TOOLS:
colored pencils, markers, watercolors, acrylic and airbrush http://www.marcellobarenghi.com/p/materials-used-for-my-drawing-video-on.html
➜ FINAL DRAWING: http://www.marcellobarenghi.com/2013/07/parrot-drawing.html
➜ THIS DRAWING TOOK ME: 3 hours and 52 minutes