Meet Paraguay’s Chopi Sa’yju: The Golden Bird Whose Song Is Slowly Fading Away

Paraguay’s birds inhabit an extraordinary range of landscapes, from the forests and wetlands of the east to the vast grasslands of the Chaco and the green spaces woven into our cities. Some are familiar sights, while others are becoming increasingly difficult to find. In this Birds of Paraguay series, The Asunción Times, with the support of the Club de Observadores de Aves del Paraguay (CON), invites readers to discover the country through its birdlife, exploring different species, their habitats, behaviours and role in Paraguay’s ecosystems. In Birds of Paraguay #5, we meet Paraguay’s Chopi Sa’yju: The Golden Bird Whose Song Is Fading Away in the wetlands and grasslands of southern South America. The Chopi Sa’yju, or Saffron-cowled Blackbird, is a striking golden bird whose distinctive song is becoming more difficult to hear.

A song fading away

In the humid grasslands of southern part of the continent, a very distinctive song can be heard. It belongs to the Chopi Sa’yju, commonly known as the Saffron-cowled Blackbird (Xanthopsar flavus). Its bright plumage and melodious song make it one of the most striking birds in the region. Yet behind its beauty lies a troubling reality: it is currently classified as Endangered (EN) on the IUCN Red List.

A jewel of the wetlands

The Saffron-cowled Blackbird inhabits Argentina, Brazil, Uruguay, and Paraguay, where it is deeply tied to wetlands and natural grasslands. Unfortunately, the loss of these habitats due to agricultural expansion, intensive cattle ranching, and urbanisation has drastically reduced its population. Today, witnessing a flock of Saffron-cowled Blackbirds is a rare privilege.

Its situation is critical. The flocks that once painted the skies gold are now small and scattered. Habitat fragmentation and a lack of biological corridors severely hinder the species’ reproduction and survival.

The ecological role of the saffron-cowled blackbird

Beyond its beauty, this species plays an essential role in its environment:

Pest Control: It feeds on insects, contributing to the natural balance of the ecosystem.
Seed Dispersal: It helps maintain plant diversity throughout the wetlands.
Environmental Indicator: Its presence or absence serves as a vital signal of overall ecosystem health.

What’s at stake

Protecting the Saffron-cowled Blackbird means conserving grasslands and wetlands, ecosystems that regulate water, store carbon, and sustain immense biodiversity. Every hectare lost is a blow not only to this species but to the entire environmental balance of the region. Necessary actions include restoring wetlands, creating protected areas, and raising awareness among local communities about the bird’s cultural and ecological value.

Organizations such as Guyra Paraguay and Aves Argentinas are working together to monitor breeding colonies and design regional conservation strategies. Key initiatives include:

Systematic nest monitoring in reserves like Guyra Retã, a conservation complex of more than 6,000 hectares in the San Rafael area, protecting forests and natural grasslands that shelter threatened species such as the Saffron-cowled Blackbird.
Physical protection of nests against predators.
International collaboration with BirdLife International and European Union funds to sustain ongoing research and habitat management.

An Invitation to the South American Bird Fair

If this article has sparked your curiosity about Paraguay’s birds and the ecosystems they inhabit, there is a perfect opportunity to explore further. The South American Bird Fair is coming to Asunción from 17 to 20 September 2026, bringing together birdwatchers, researchers, photographers and nature lovers at the Cultural Center of the Port of Asunción.

Through talks, guided outings and educational activities, the event will offer a chance to discover the continent’s extraordinary birdlife while learning more about the habitats that sustain it. For species such as the Saffron-cowled Blackbird, whose future depends on the survival of grasslands and wetlands, that connection between discovering nature and protecting it is more important than ever. For more information, visit the South American Bird Fair official website.