Agelaioides badius
Silhouette: Sheatherius · PhyloPic
In 3 days ~60% in a week ~90%
The greyish baywing (Agelaioides badius) 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, and there are unconfirmed reports from Chile.
The greyish baywing was formally described in 1819 with the binomial Agelaius badius. It was later placed in genus Molothrus and spent most of the twentieth century there with the English name "bay-winged cowbird". After it was reassigned to its present genus Agelaioides many authors called it simply "baywing" because it had significant behavioral differences from the Molothrus cowbirds. At this time it included three subspecies. In the mid-2010s one of them, A. b. fringillarius, was recognized as a full species and named the pale baywing. The reduced A. badius, which includes the second subspecies A. b. bolivianus, was renamed the greyish baywing.
The greyish baywing is 19 cm (7 in) long. Males weigh an average of about 46 g (1.6 oz) and females average about 42 g (1.5 oz). Both sexes of both subspecies have the same plumage though A. b. bolivianus is larger than the nominate... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | El Palmar National Park | 🇦🇷 Argentina | |
| 2 | El Impenetrable National Park | 🇦🇷 Argentina | |
| 3 | Iberá National Park | 🇦🇷 Argentina | |
| 4 | Chapada Diamantina National Park | 🇧🇷 Brazil | |
| 5 | Parque Estadual Encontro das Águas | 🇧🇷 Brazil | |
| 6 | Península Valdés | 🇦🇷 Argentina | |
| 7 | Iguaçu National Park | 🇧🇷 Brazil | |
| 8 | Iguazú National Park | 🇦🇷 Argentina | |
| 9 | Chapada dos Guimarães National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Buenos Aires | 🇦🇷 Argentina | |
| 2 | Cochabamba | 🇧🇴 Bolivia | |
| 3 | Cordoba | 🇦🇷 Argentina | |
| 4 | Mendoza | 🇦🇷 Argentina | |
| 5 | Rosario | 🇦🇷 Argentina | |
| 6 | Porto Alegre | 🇧🇷 Brazil | |
| 7 | Asuncion | 🇵🇾 Paraguay | |
| 8 | Curitiba | 🇧🇷 Brazil | |
| 9 | Santa Cruz de la Sierra | 🇧🇴 Bolivia | |
| 10 | Salvador | 🇧🇷 Brazil |
Possible
About 30% of wildlife watchers report a Grayish Baywing sighting in Iberá National Park on a given day, based on 442 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 90th most-seen of the 284 birds we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
May and December
In those months about 40% of wildlife watchers report a Grayish Baywing in Iberá National Park on a given day, against about 20% in March–April, June–July and October, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Grayish Baywing sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 9
Of the 9 parks where we can rate Grayish Baywing sightings, Iberá National Park ranks 3rd at about 30%. The best odds are in El Palmar National Park (Argentina, about 50%) and El Impenetrable National Park (Argentina, about 50%).
Same family: Icteridae
The closest relatives of the Grayish Baywing 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 Grayish Baywing is recorded against all the birds logged in Iberá National Park (442 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.
