Hylophilus poicilotis
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~30%
The rufous-crowned greenlet (Hylophilus poicilotis) is a species of bird in the family Vireonidae, the vireos, greenlets, and shrike-babblers. It is found in Argentina, Brazil, Paraguay, and possibly Bolivia. The rufous-crowned greenlet is monotypic. However, for much of the twentieth century what is now the grey-eyed greenlet (Hylophilus amaurocephalus) was treated as a subspecies of it. By the 1990s they were generally recognized as separate species.
The rufous-crowned greenlet is about 12.5 cm (4.9 in) long and weighs 9 to 12 g (0.32 to 0.42 oz). The sexes have the same plumage. Adults have a bright chestnut-brown forehead and crown and mottled grayish black ear coverts. Their nape, upper back, and shoulders are olive-green and their lower back and rump are a brighter green. Their wings are dull grayish black with thin greenish edges on the outer webs of the primaries and secondaries and yellow-green edges on the inner webs of the tertials. Their tail is grayish green with brighter greenish edges on the feathers' outer webs. Their throat is dull pale gray, their upper breast yellowish gray, their lower breast dull yellow, their flanks... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Itatiaia National Park | 🇧🇷 Brazil | |
| 2 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 3 | Iguazú National Park | 🇦🇷 Argentina | |
| 4 | Iguaçu National Park | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Rufous-crowned Greenlet sighting in Iguaçu National Park on a given day, based on 211 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 157th most-seen of the 346 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
January, June–August and November
In those months about 10% of wildlife watchers report a Rufous-crowned Greenlet in Iguaçu National Park on a given day, against under 5% in February–May, September–October and December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Rufous-crowned Greenlet 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 4
Of the 4 parks where we can rate Rufous-crowned Greenlet sightings, Iguaçu National Park ranks 4th at about 10%. The best odds are in Itatiaia National Park (Brazil, about 40%), Serra dos Órgãos National Park (Brazil, about 20%) and Iguazú National Park (Argentina, about 10%).
Same family: Vireonidae
The closest relatives of the Rufous-crowned Greenlet that you can see in Iguaçu National Park (family Vireonidae, Vireos, Shrike-Babblers, and Erpornis) are Red-eyed Vireo (about 20%) and Rufous-browed Peppershrike (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rufous-crowned Greenlet is recorded against all the birds logged in Iguaçu National Park (211 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.
