"Birds were precious resources in the economy of Andean societies. Merchants traded brilliantly colored parrot and macaw feathers in long-distance networks connecting the Amazonian rainforest, the Cordillera, and the remote Pacific coast, where they adorned the sumptuous garments of rulers and kings. Coastal agriculturalists used guano to enrich their fields. Sailors collected the valuable fertilizer offshore on sacred islands, where they left prestigious offerings. On the coast, domesticated muscovy ducks may have been part of the subsistence."
Birds of the Andes, by Hélène Bernier, Source: Birds of the Andes | Thematic Essay | Heilbrunn Timeline of Art History | The Metropolitan Museum of Art