An article in the New York Times (May 19, 2012) describes a closed loop supply chain fosterd by nature. Birs, in this case red-footed boobies, nest high on the trees and feed on fish and squid. Their waste, guano, is rich in nutrients and falls to the gorund and nurtures the forest. Rains wash these nutrients to the coastal waters and thus feed plankton. The fish feed on the plankton and are a source of nutrients for the birds, thus closing the supply chain. What lessons can these sustainable closed lop supply chains fostered by nature provide for industrial supply chains ? Given nature’s resilience, should one expect these links to adapt to human intervention, such a pollution, or collapse as a result ? Should the focus be on protecting the weakest link in this supply chain to nurture its continued survival, and, if so, how should laws be enacted to protect such links ?