| Length (km) | Tributary | % Correct |
|---|---|---|
| 2,250 | Negro | 90%
|
| 3,250 | Madeira | 65%
|
| 2,639 | Tocantins | 59%
|
| 1,979 | Xingu | 52%
|
| 3,211 | Purus | 37%
|
| 1,992 | Tapajós | 29%
|
| 2,627 | Araguaia | 25%
|
| 1,900 | Ucayali | 24%
|
| 2,820 | Japurá | 21%
|
| 2,400 | Juruá | 17%
|