Deadly virus strikes final remaining rare blue macaws in the Brazilian wilderness

The only wild Spix's macaws recently reintroduced to their native habitats in Brazil have been diagnosed with a fatal, incurable virus, according to the Brazilian government.

This setback is a major blow to conservation efforts aimed at restoring the species, famously featured in the 2011 animated film "Rio," to the semi-arid regions of northeast Brazil, 25 years after the birds were considered extinct in the wild.

Brazils conservation agency, ICMBio, reported that since the first batch of Spix's macaws arrived from Germany in 2020, approximately 20 were released into the wild, with only 11 surviving. All of these surviving birds tested positive for circovirus, a disease causing beak and feather abnormalities in parrots, though it is harmless to humans.

"This disease has no cure and is often lethal to the birds," ICMBio stated.

Additionally, 21 out of roughly 90 birds still kept at a breeding facility in Bahia also tested positive for the virus.

The animated film "Rio" portrays a Spix's macaw raised in the United States returning to Brazil to help save its species, while real-life conservation efforts are far more challenging, plagued by institutional disputes, unethical breeders, and private collector sales.

The BlueSky breeding center, collaborating with the German Association for the Conservation of Threatened Parrots (ACTP)which owns 75% of the worlds registered Spix's macawswas a key player in these efforts. However, Brazil ended its partnership with ACTP in 2024 after the organization sold 26 birds to a private zoo in India without permission.

Brazil has repeatedly voiced concerns at CITES meetings about loopholes that allow captive-bred Spix's macaws to be sold, increasing pressure on the endangered species. Besides habitat loss, private collector demand was a primary factor in the species extinction in the wild.

ICMBio has fined BlueSky 1.8 million reais ($336,000) for failing to follow biosafety measures to prevent virus spread. Inspectors found "extremely dirty" feeders and staff handling birds in flip-flops, shorts, and t-shirts.

The breeding center resisted orders to recapture the wild macaws, mandated by a court in October, but recently claimed that parrots in South America are "more resistant" to circovirus. Some birds have already recovered and tested negative, the center reported.

BlueSky has implemented stricter hygiene practices, isolated healthy birds, and built barriers to prevent contact between wild and captive birds. "No birds died, all are flying well and feeding normally," the center confirmed.

Analysis: Setback for Spix's Macaw Reintroduction

The recent diagnosis of circovirus in all surviving wild Spix's macaws marks a serious challenge for Brazil's conservation efforts. These birds, reintroduced from Germany starting in 2020, now face a disease that is often lethal and has no known cure, undermining decades of work to restore the species in its native semi-arid habitats.

ICMBio reports that 21 birds in captivity at the Bahia breeding facility also carry the virus, highlighting ongoing biosafety shortcomings. The agency has fined the BlueSky breeding center for failing to maintain basic hygiene and containment measures, a factor likely contributing to viral spread. Court orders to recapture wild macaws have met resistance, complicating mitigation strategies.

While the BlueSky center asserts that some birds have recovered and remains optimistic about the wild population's resilience, the broader picture remains concerning. The combination of infectious disease, habitat vulnerability, and prior management controversies underscores the precarious status of the Spix's macaw, illustrating how fragile reintroduction programs can be even decades after a species is declared extinct in the wild.

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• Lethal virus hits last rare blue macaws in Brazil wild