Stilpnia preciosa
Silhouette: Sheatherius · PhyloPic
In 3 days ~30% in a week ~50%
The chestnut-backed tanager (Stilpnia preciosa) is a species of bird in the family Thraupidae. It is found in southern Brazil, north-eastern Argentina, eastern Paraguay, and Uruguay in mature forests (especially edges) up to 1000m elevation. It is closely related to the rarer black-backed tanager, which have identical plumage except for the males' mantle (back feathers). Females of the two species are virtually indistinguishable by plumage. This bird is characterized by its blue-green breast and chestnut back. It was previously considered a color morph of the black-backed tanager (Stilpnia peruviana); however, Stilpnia is not known to be polymorphic, and the two species have different habitat preferences and breeding range. The tanager is reported as fairly common in part of its range and unlikely to face any particular threats; as a result, the IUCN has listed it as being of Least Concern.
The tanager eats a variety of arthropods and wild and cultivated fruits. It can be found in pairs and in small (often mixed-species) flocks. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Palmar National Park | 🇦🇷 Argentina | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Iguaçu National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Curitiba | 🇧🇷 Brazil | |
| 2 | Porto Alegre | 🇧🇷 Brazil |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | São Paulo Zoo | 🇧🇷 Brazil | |
| 2 | Berlin Zoological Garden | 🇩🇪 Germany | |
| 3 | Aquarium Berlin | 🇩🇪 Germany |
With luck
About 10% of wildlife watchers report a Chestnut-backed Tanager sighting in El Palmar National Park on a given day, based on 48 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 92nd most-seen of the 151 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
April–May and November–December
In those months about 20% of wildlife watchers report a Chestnut-backed Tanager in El Palmar National Park on a given day, against under 5% in March, June and August–October, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Chestnut-backed Tanager sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 parks where we can rate Chestnut-backed Tanager sightings, El Palmar National Park has the highest daily chance: about 10%. Next come Iguazú National Park (Argentina, under 5%) and Iguaçu National Park (Brazil, under 5%).
Same family: Thraupidae
The closest relatives of the Chestnut-backed Tanager that you can see in El Palmar National Park (family Thraupidae, Tanagers and Allies) are Golden-billed Saltator (about 80%), Sayaca Tanager (about 70%) and Brazilian Cardinal (about 60%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut-backed Tanager is recorded against all the birds logged in El Palmar National Park (48 verified sightings from 2019 to 2026), 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.
