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In page Spix's macaw:

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Notable among the seasonal waterways are Riacho Melância watershed 30 km south of Curaçá, where the last known wild Spix's macaw nest was located, adjacent Riacho Barra Grande, and Riacho da Vargem ~100 km to the north near Abaré all in the State of Bahia south of Rio São Francisco. In 1990, these were all that remained of what was once believed to be a vast filigree of creekside Caraibeira woodland extending 50 km into the Caatinga on either side of the Rio São Francisco along a significant stretch of its middle reaches.[6] There is also one confirmed site, since cleared, along Brígida Creek on the north shore of Rio São Francisco in Pernambuco.[7]