The Red-spectacled Amazon is almost confined to the state of Rio Grande do Sul but with some wintering birds in south-east Santa Catarina and some scarce records for Argentina and Paraguay. The distribution map from NatureServe shows that distribution stretches further north than this.

The pair of birds in these photos were flying over the rio Camaquã and you can see the red on the forehead, face and front edge of the wings, the pale bill and the white eye-ring. The bird furthest from the camera is the male which shows more extensive red on the wings while the female is nearest the camera.

There is an excellent page by Birdlife International here.

Jeremy Minns recorded these two birds as they flew over though only one bird was vocalizing.