Agelasticus cyanopus
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~30%
The unicolored blackbird (Agelasticus cyanopus) 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, Uruguay, and as a vagrant in Peru.
The unicolored blackbird was formally described in 1819 with the binomial Agelaius cyanopus. The species was later assigned to genus Chrysomus. By the 1990s Agelaius and Chrysomus were beginning to be recognized as polyphyletic, and early in the twenty-first century Agelasticus, which had been erected in 1851, was resurrected for the unicolored blackbird and two other species.
The unicolored blackbird's further taxonomy is unsettled. The IOC, AviList, and BirdLife International's Handbook of the Birds of the World recognize these four subspecies: The females have notably different plumage and some authors have suggested...
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Parque Estadual Encontro das Águas | 🇧🇷 Brazil | |
| 2 | Iberá National Park | 🇦🇷 Argentina | |
| 3 | El Impenetrable National Park | 🇦🇷 Argentina | |
| 4 | Madidi National Park | 🇧🇴 Bolivia | |
| 5 | Iguazú National Park | 🇦🇷 Argentina | |
| 6 | Iguaçu National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Asuncion | 🇵🇾 Paraguay | |
| 2 | São Paulo | 🇧🇷 Brazil | |
| 3 | Buenos Aires | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a Unicoloured Blackbird sighting in Madidi National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 188th most-seen of the 239 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 and September–November
In those months about 10% of wildlife watchers report a Unicoloured Blackbird in Madidi National Park on a given day, against under 5% in February and April–August, the lowest months. March and December have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Unicoloured Blackbird sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 6
Of the 6 parks where we can rate Unicoloured Blackbird sightings, Madidi National Park ranks 4th at under 5%. The best odds are in Parque Estadual Encontro das Águas (Brazil, about 50%), Iberá National Park (Argentina, about 30%) and El Impenetrable National Park (Argentina, under 5%).
Same family: Icteridae
The closest relatives of the Unicoloured Blackbird that you can see in Madidi National Park (family Icteridae, New World Blackbirds and Orioles) are Yellow-rumped Cacique (about 30%), Crested Oropendola (about 20%) and Chopí Blackbird (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Unicoloured Blackbird is recorded against all the birds logged in Madidi National Park (6 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.
