http://www.treehugger.com/galleries/2010/08/with-spectacular-stick-sculptures-by-patrick-dougherty-art-and-nature-collide.php
Sculptor Patrick Dougherty's vibrant, nest-like works are shaped from sustainably harvested tree twigs and saplings -- sometimes thousands of tons worth -- and woven together with the help of volunteers, but without any nails, wire, or other hardware.
Relying only on the materials' own natural propensity to entangle and intertwine, Dougherty creates what the San Francisco Arts Commission calls "a joyful and exuberant collision of art and nature."
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