Phyllomyias virescens
Silhouette: Emily Willoughby · PhyloPic
In 3 days <5% in a week ~10%
The greenish tyrannulet (Phyllomyias virescens) is a species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Brazil, Paraguay, and Uruguay. In the early to mid twentieth century some authors placed the greenish tyrannulet in genus Xanthomyias; that genus was merged into Phyllomyias in the 1970s. Some of the same authors, and others, treated the greenish tyrannulet and Reiser's tyrannulet (P. reiseri) as conspecific. They were separated around the turn of the twentieth century. The two of them and Urich's tyrannulet (P. uruchi) form a superspecies.
The greenish tyrannulet is monotypic. The greenish tyrannulet is 12 to 13.5 cm (4.7 to 5.3 in) long and weighs 10 to 12 g (0.35 to 0.42 oz). The sexes have the same plumage. Adults have a bright olive crown, nape, back, and rump. They have white lores and supercilium, an olive line through the eye, and whitish ear coverts with faint darker speckles. Their wings are dusky with pale yellowish edges on the flight feathers and the ends of the coverts; the last show as two bars on the closed wing. Their tail is dusky. Their throat is whitish... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Itatiaia National Park | 🇧🇷 Brazil | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Iguaçu National Park | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Greenish Tyrannulet sighting in Iguazú National Park on a given day, based on 46 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 257th most-seen of the 343 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Greenish Tyrannulet in Iguazú National Park on a given day, so our monthly data shows no clear season.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Greenish Tyrannulet sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 3
Of the 3 parks where we can rate Greenish Tyrannulet sightings, Iguazú National Park ranks 2nd at under 5%. The best odds are in Itatiaia National Park (Brazil, about 10%).
Same family: Tyrannidae
The closest relatives of the Greenish Tyrannulet that you can see in Iguazú National Park (family Tyrannidae, Tyrant Flycatchers) are Great Kiskadee (about 80%), Social Flycatcher (about 30%) and Boat-billed Flycatcher (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Greenish Tyrannulet is recorded against all the birds logged in Iguazú National Park (46 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.
