Back caption: Birds of the cliffs / Bronx Zoo, New York City / Big Guanay Cormorants and white-mustached Inca Terns are birds that live on rocky cliffs high above the sea. This reproduction of a cliff (the stones are man-made) is so realistic that Inca Terns regularly nest in the crevices. The Guanay Cormorant is among the birds that produce guano fertilizer in South America.
