Grayish Baywing

Grayish Baywing

Agelaioides badius

Silhouette: Sheatherius · PhyloPic

LCLeast ConcernNTVUENCR
Daily sighting probability ~40% · Likely
at Mendoza

In 3 days ~80% in a week >90%

162 Verified sightings at Mendoza
1,026 In all 9 parks From 2019 to 2026
March Best month
☀️ Diurnal When it's spotted

About the Grayish Baywing

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 →

Sounds

Call0:05

Argentina · 2025

© Marcos E. Sosa · XC1065678 · CC BY-NC-SA 4.0

Song1:07

Argentina · 2022

© Pablo Adrián Otero · XC749005 · CC BY-NC-SA 4.0

Alarm call0:17

Argentina · 2014

© Gabriele Magurno · XC202067 · CC BY-SA 4.0

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 El Palmar National Park 🇦🇷 Argentina
~50%
2 El Impenetrable National Park 🇦🇷 Argentina
~50%
3 Iberá National Park 🇦🇷 Argentina
~30%
4 Chapada Diamantina National Park 🇧🇷 Brazil
~10%
5 Parque Estadual Encontro das Águas 🇧🇷 Brazil
~10%
6 Península Valdés 🇦🇷 Argentina
<5%
7 Iguaçu National Park 🇧🇷 Brazil
<5%
8 Iguazú National Park 🇦🇷 Argentina
<5%
9 Chapada dos Guimarães National Park 🇧🇷 Brazil
<5%

Cities Where Found

# City Country Daily sighting probability
1 Buenos Aires 🇦🇷 Argentina
~70%
2 Cochabamba 🇧🇴 Bolivia
~70%
3 Cordoba 🇦🇷 Argentina
~50%
4 Mendoza 🇦🇷 Argentina
~40%
5 Rosario 🇦🇷 Argentina
~30%
6 Porto Alegre 🇧🇷 Brazil
~20%
7 Asuncion 🇵🇾 Paraguay
~20%
8 Curitiba 🇧🇷 Brazil
~10%
9 Santa Cruz de la Sierra 🇧🇴 Bolivia
~10%
10 Salvador 🇧🇷 Brazil
<5%

Before you go

What are the chances of seeing a Grayish Baywing in Mendoza?

Likely

About 40% of wildlife watchers report a Grayish Baywing sighting in Mendoza on a given day, based on 162 verified sightings from GBIF citizen-science data. It is the 16th most-seen of the 69 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.

When is the best time to see a Grayish Baywing in Mendoza?

March

In that month about 70% of wildlife watchers report a Grayish Baywing in Mendoza on a given day, against about 30% in June, October and December, the lowest months. That is one of Mendoza's wettest months, with about 35 mm of rain against 10 mm in June.

What time of day is best to see a Grayish Baywing?

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.

Is Mendoza the best place to see a Grayish Baywing?

4th of 12

Of the 12 cities where we can rate Grayish Baywing sightings, Mendoza ranks 4th at about 40%. The best odds are in Buenos Aires (Argentina, about 70%), Cochabamba (Bolivia, about 70%) and Cordoba (Argentina, about 50%).

Which relatives of the Grayish Baywing live in Mendoza?

Same family: Icteridae

The closest relatives of the Grayish Baywing that you can see in Mendoza (family Icteridae, New World Blackbirds and Orioles) are Shiny Cowbird (about 60%) and Screaming Cowbird (about 10%), with each one's daily chance of a sighting.

Where does the Grayish Baywing sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Grayish Baywing is recorded against all the birds logged in Mendoza (162 verified sightings), 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.

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