Olivaceous Elaenia
Elaenia mesoleuca
The olivaceous elaenia is a species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Brazil, Paraguay, and Uruguay. Source
Where it is now
In the last 8 weeks this bird was recorded 4,461 times across 5 areas (each area is a 5 degree square).
See the Olivaceous Elaenia on the live map
Arrival dates
The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.
| Region | First arrival | Last arrival | Typical peak | Areas |
|---|---|---|---|---|
| South America | 5 October 2026 | 5 October 2026 | 12 October 2026 | 1 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.