Follow the Birds.

The article discusses the reliance of 16th century European mariners on seabirds for navigation in the Atlantic. Topics explored include the way Portuguese explorer Pedro Álvares Cabral and his fleet followed birds called fura buchos while at sea which led them to a region along Brazil, the species of seabirds that live and breed on coasts, and the economic significance of seabird colonies to fishing crews at the floating colony called Terra Nova.