An international investigation revealed that several species of Amazon parrots were transported alive across the Andes mountain range centuries before the rise of the Inca Empire.
The study involved scientists from the University of Zaragoza and the Australian National University, who analyzed archaeological remains found in the ancient Pachacámac sanctuary.
The results, published in Nature Communications, demonstrate the existence of complex exchange networks that connected the Amazon rainforest with arid regions of the Pacific coast.
Furthermore, the work shows that pre-Inca societies already maintained organized trade routes that traversed very different environments. Consequently, researchers believe these networks reflect a deep ecological knowledge of South American landscapes.
Ancient DNA reconstructs pre-Inca trade routes
The scientific team analyzed feathers found in burials linked to the Ychsma culture, which inhabited the Peruvian coast between the years 1000 and 1470 AD. To reconstruct the origin of the birds, ancient DNA analyses, isotopic studies, and geographic landscape models were combined.
This approach allowed precise identification of the species and evaluation of their genetic diversity. The results revealed that the feathers belonged to four Amazonian species: the red macaw, the red and green macaw, the blue and yellow macaw, and the mealy Amazon.
Additionally, the analyses detected a feather belonging to the Sabine’s gull, a marine species typical of the Pacific coast. The genetic diversity found indicates that the birds came from wild populations and not from captive breeding.
Evidence of live parrot transport across the Andes
The historical habitat studies revealed that the western side of the Andes was an unsuitable environment for these tropical species. Amazon parrots typically inhabit humid forests, and their natural range rarely exceeds 150 kilometers.
However, the remains found in Pachacámac are located more than 500 kilometers from the regions where these birds naturally live. This fact confirms that their presence on the coast was the result of human intervention.
The isotopic analyses also showed that the birds consumed foods typical of the coast, such as corn crops fertilized with marine guano. This indicates that the animals remained alive for a considerable time after being transported from the jungle.
Ecological characteristics of Amazonian macaws
The Amazonian macaws belong to the group of the largest and most colorful tropical parrots on the planet. These birds are notable for their bright plumage, which includes red, blue, green, and yellow tones that serve functions of communication and recognition among individuals.
They primarily inhabit humid forests of South America, where they play a fundamental ecological role as seed dispersers. Additionally, they exhibit great intelligence and strong social bonds within their groups.
Their reproduction is slow and depends on cavities in large trees, making their survival closely linked to the conservation of tropical forests.
Due to these characteristics, many species of macaws face threats associated with habitat loss and illegal wildlife trafficking.
Trade networks and ecological knowledge in ancient Andes
Transporting live macaws involved enormous logistical challenges. The birds had to cross regions of cold climate in the Andes and then descend into extremely dry deserts.
To achieve this, traders likely used carefully selected land and river routes. These geographic corridors would have allowed transporting animals for weeks or months without them dying along the way.
The finding suggests that pre-Inca cultures like the Ychsma and Chimú already managed complex regional exchange systems. It also reveals that the environmental knowledge and economic organization of these societies were much more advanced than previously thought.
Thus, the study not only reconstructs ancient trade routes but also highlights the historical relationship between biodiversity, culture, and landscape in South America.
