Elaenia mesoleuca
Silhouette: Edwin Price · PhyloPic
In 3 days ~10% in a week ~30%
The olivaceous elaenia (Elaenia mesoleuca) is a species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Brazil, Paraguay, and Uruguay. Though one mid-late twentieth century publication credited Lichtenstein with the species description, since the 1990s taxonomic systems attribute it to Deppe.
The olivaceous elaenia is monotypic. The olivaceous elaenia is 14 to 16 cm (5.5 to 6.3 in) long and weighs 16 to 20 g (0.56 to 0.71 oz). It is a small elaenia without a crest. The sexes have the same plumage. Adults have a dull olive crown with minimal or no white in the middle. They have a white eyering. Their upperparts are dull olive. Their wings are dusky with yellowish or white tips on the coverts that show as two wing bars. Their flight feathers have narrow whitish edges. Their tail is dusky. Their throat is dull gray, their breast olive in a vest-like pattern, their belly white, and their flanks and undertail coverts whitish with a yellow wash. Both sexes have a brown iris, a black bill with a dusky pinkish base to the mandible, and black legs and feet. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Itatiaia National Park | 🇧🇷 Brazil | |
| 2 | Iguaçu National Park | 🇧🇷 Brazil | |
| 3 | Iguazú National Park | 🇦🇷 Argentina |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Curitiba | 🇧🇷 Brazil | |
| 2 | Buenos Aires | 🇦🇷 Argentina | |
| 3 | Porto Alegre | 🇧🇷 Brazil | |
| 4 | Belo Horizonte | 🇧🇷 Brazil | |
| 5 | São Paulo | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report an Olivaceous Elaenia sighting in Curitiba on a given day, based on 64 verified sightings from GBIF citizen-science data. It is the 117th most-seen of the 247 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
January
In that month about 20% of wildlife watchers report an Olivaceous Elaenia in Curitiba on a given day, against under 5% in February to October, the lowest months. That is one of Curitiba's wettest months, with about 220 mm of rain against 75 mm in August.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Olivaceous Elaenia sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 5 cities where we can rate Olivaceous Elaenia sightings, Curitiba has the highest daily chance: under 5%. Next come Buenos Aires (Argentina, under 5%) and Porto Alegre (Brazil, under 5%).
GBIF citizen-science records
It is estimated from how often the Olivaceous Elaenia is recorded against all the birds logged in Curitiba (64 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
