Chrysomus ruficapillus
Silhouette: Sheatherius · PhyloPic
In 3 days ~40% in a week ~70%
The chestnut-capped blackbird (Chrysomus ruficapillus) is a species of bird in the family Icteridae, the oropendolas, New World orioles, and New World blackbirds. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay.
The chestnut-capped blackbird was formally described in 1819 with the binomial Agelaius ruficapillus. In the late twentieth century it was reassigned to its present genus Chrysomus, which had been erected in 1837. It shares that genus with the yellow-hooded blackbird (C. icterocephalus).
Male chestnut-capped blackbirds average 18.5 cm (7.3 in) long and females 17.1 cm (6.7 in). Males weigh an average of 41.3 g (1.5 oz) and females average 32.2 g (1.1 oz). The species is sexually dimorphic. Adult males of the nominate subspecies have a deep dark chestnut forecrown, midcrown, throat, and upper breast. The rest of their plumages is black with a faint bluish gloss. Adult females of the nominate subspecies have a mostly olivaceous brown head with a faint buffish supercilium.... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Iberá National Park | 🇦🇷 Argentina | |
| 2 | Chapada Diamantina National Park | 🇧🇷 Brazil | |
| 3 | Serra da Canastra National Park | 🇧🇷 Brazil | |
| 4 | El Impenetrable National Park | 🇦🇷 Argentina | |
| 5 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 6 | Itatiaia National Park | 🇧🇷 Brazil | |
| 7 | Iguaçu National Park | 🇧🇷 Brazil | |
| 8 | Parque Estadual Encontro das Águas | 🇧🇷 Brazil | |
| 9 | Iguazú National Park | 🇦🇷 Argentina |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rosario | 🇦🇷 Argentina | |
| 2 | Curitiba | 🇧🇷 Brazil | |
| 3 | Goiânia | 🇧🇷 Brazil | |
| 4 | Belo Horizonte | 🇧🇷 Brazil | |
| 5 | Campinas | 🇧🇷 Brazil | |
| 6 | São Paulo | 🇧🇷 Brazil | |
| 7 | Santa Cruz de la Sierra | 🇧🇴 Bolivia | |
| 8 | Asuncion | 🇵🇾 Paraguay | |
| 9 | Brasilia | 🇧🇷 Brazil | |
| 10 | Porto Alegre | 🇧🇷 Brazil |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Zoológico de Brasília | 🇧🇷 Brazil | |
| 2 | Córdoba Zoo | 🇦🇷 Argentina |
With luck
About 10% of wildlife watchers report a Chestnut-capped Blackbird sighting in Iberá National Park on a given day, based on 254 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 130th most-seen of the 284 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
September and October
In those months about 30% of wildlife watchers report a Chestnut-capped Blackbird in Iberá National Park on a given day, against under 5% in February to April, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Chestnut-capped Blackbird sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 9 parks where we can rate Chestnut-capped Blackbird sightings, Iberá National Park has the highest daily chance: about 10%. Next come Chapada Diamantina National Park (Brazil, about 10%) and Serra da Canastra National Park (Brazil, about 10%).
Same family: Icteridae
The closest relatives of the Chestnut-capped Blackbird that you can see in Iberá National Park (family Icteridae, New World Blackbirds and Orioles) are Shiny Cowbird (about 40%), Yellow-rumped Marshbird (about 40%) and Scarlet-headed Blackbird (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut-capped Blackbird is recorded against all the birds logged in Iberá National Park (254 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.
