斯皮克斯金剛鸚鵡於2000年被宣佈在野外滅絕，並於2022年開始野放計畫。近月繁殖中心的七隻金剛鸚鵡（其中包括一隻在野外出生的幼鳥）被檢測出感染圓環病毒。圓環病毒會引發鸚鵡喙與羽毛疾病，是一種高度傳染且可能致命的病毒，目前尚無有效療法。研究人員正在採集其他野生鳥類的樣本，以確定病毒是否已於野外傳播。

The reintroduction program for the Spix’s macaw, a species declared extinct in the wild in 2000, began in 2022. However, seven macaws at the breeding center including one chick born in the wild were tested positive for circovirus. Circovirus causes beak and feather disease; it is highly contagious and potentially lethal, with no known cure. Researchers are currently collecting samples from other wild birds to determine whether the virus has spread.

https://news.mongabay.com/2025/10/virus-outbreak-deepens-rift-over-return-of-spixs-macaw-to-brazil/