Agelasticus thilius
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~50%
The yellow-winged blackbird (Agelasticus thilius) 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, Chile, Paraguay, Peru, and Uruguay.
The yellow-winged blackbird was formally described in 1782 with the binomial Turdus Thilius [sic]. Genus Agelasticus had been erected in 1851 and in 1855 Turdus thilius was designated as its type species and renamed Agelasticus thilius. However, A. thilius was later assigned at different times to genera Agelaius and Chrysomus. By the 1990s those two genera were beginning to be recognized as polyphyletic, and early in the twenty-first century Agelasticus was resurrected for the yellow-winged blackbird and two other species.
Male yellow-winged blackbirds average 17.9 cm (7.0 in) long. Males weigh an average of 33.5 g (1.2 oz) and females average about 29 g (1.0 oz). The species is sexually dimorphic. Adult males of the nominate subspecies are almost... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Torres del Paine National Park | 🇨🇱 Chile | |
| 2 | Iberá National Park | 🇦🇷 Argentina | |
| 3 | Nahuel Huapi National Park | 🇦🇷 Argentina |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santiago | 🇨🇱 Chile | |
| 2 | Cochabamba | 🇧🇴 Bolivia | |
| 3 | Buenos Aires | 🇦🇷 Argentina | |
| 4 | Cordoba | 🇦🇷 Argentina | |
| 5 | Montevideo | 🇺🇾 Uruguay |
With luck
About 10% of wildlife watchers report a Yellow-winged Blackbird sighting in Iberá National Park on a given day, based on 140 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 161st most-seen of the 284 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
October
In that month about 20% of wildlife watchers report a Yellow-winged Blackbird in Iberá National Park on a given day, against under 5% in March–April, July and December, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Yellow-winged 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.
Among the best
Of the 3 parks where we can rate Yellow-winged Blackbird sightings, Iberá National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Torres del Paine National Park (Chile, about 10%).
GBIF citizen-science records
It is estimated from how often the Yellow-winged Blackbird is recorded against all the birds logged in Iberá National Park (140 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.
