Stilpnia preciosa
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
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 |
Rare
Under 5% of wildlife watchers report a Chestnut-backed Tanager sighting in Iguazú National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 306th most-seen of the 343 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Chestnut-backed Tanager in Iguazú National Park on a given day, so our monthly data shows no clear season.
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.
2nd of 3
Of the 3 parks where we can rate Chestnut-backed Tanager sightings, Iguazú National Park ranks 2nd at under 5%. The best odds are in El Palmar National Park (Argentina, about 10%).
Same family: Thraupidae
The closest relatives of the Chestnut-backed Tanager that you can see in Iguazú National Park (family Thraupidae, Tanagers and Allies) are Sayaca Tanager (about 40%), Blue Dacnis (about 40%) and Saffron Finch (about 30%), 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 Iguazú National Park (14 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.
