Western Olivaceous Warbler
| Gender | undetermined |
| Age | undetermined |
| Plumage | adult plumage |
| Recorded | 2008-04-06 |
| Location | Massa, MA |
| Copyright | Hannes Nussbaumer |
| Family | Warblers |
| Status CH | |
| References | en.wikipedia.org |
| vogelwarte.ch |
16 | 50