Biology Professor Gerald Borgia is quoted by NPR's All Things Considered in a story on elaborate nest decorations by black kites. For years, scientists have wondered why the predatory birds gather white plastic to line their nests alongside their eggs. A new study in Science says the behavior is a signal of bravado by the strongest birds - that they can protect their nests. Borgia offers an alternative explanation: the birds may be camouflaging the eggs with the plastic. 



