Psarocolius oseryi
Silhouette: Matt Wilkins · PhyloPic
In 3 days ~10% in a week ~20%
The casqued cacique (Cacicus oseryi) is a species of bird in the family Icteridae, the oropendolas, New World orioles, and New World blackbirds. It is found in Brazil, Colombia, Ecuador, Peru, and possibly Bolivia. The casqued cacique has a complicated taxonomic history. It was formally described in 1849 with its current binomial Cacicus Oseryi [sic]. During the twentieth century it bounced between genera Clypicterus and Psarocolius. By the twenty-first century Psarocolius was no longer used and in the 2010s Clypicterus was merged into Cacicus. During its time as Psarocolius oseryi and Clypicterus oseryi it was called the "casqued oropendola".
The casqued cacique is monotypic. Male casqued caciques average 37 cm (15 in) long and 188 g (6.6 oz). Females average 29 cm (11 in) long and 101 g (3.6 oz). Males have a prominent casque and females a smaller one. The casque's color is usually yellowish gray to olivaceous gray, sometimes ivory-colored with a greenish tinge and a dark gray tip, and sometimes entirely dark gray. The sexes have the same plumage. Adults are mostly rich chestnut. Their tail is mostly dusky olive with bright yellow outer... Wikipedia →
Recording0:35
Peru · 2010
© dbeadle · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Amacayacu National Natural Park | 🇨🇴 Colombia | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador | |
| 3 | Manu National Park | 🇵🇪 Peru | |
| 4 | Tambopata National Reserve | 🇵🇪 Peru | |
| 5 | Cuyabeno Wildlife Reserve | 🇪🇨 Ecuador |
Rare
Under 5% of wildlife watchers report a Casqued Cacique sighting in Tambopata National Reserve on a given day, based on 113 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 300th most-seen of the 550 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April–May and November
In those months about 10% of wildlife watchers report a Casqued Cacique in Tambopata National Reserve on a given day, against under 5% in June–October and December–March, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Casqued Cacique sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 parks where we can rate Casqued Cacique sightings, Tambopata National Reserve ranks 4th at under 5%. The best odds are in Amacayacu National Natural Park (Colombia, about 10%), Yasuní National Park (Ecuador, about 10%) and Manu National Park (Peru, about 10%).
Same genus: Psarocolius
The closest relatives of the Casqued Cacique that you can see in Tambopata National Reserve (genus Psarocolius, Oropendolas) are Russet-backed Oropendola (about 40%), Crested Oropendola (about 30%) and Olive Oropendola (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Casqued Cacique is recorded against all the birds logged in Tambopata National Reserve (113 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.
