Phylloscartes sylviolus
Silhouette: Emily Willoughby · PhyloPic
In 3 days <5%
The bay-ringed tyrannulet (Phylloscartes sylviolus) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Brazil, and Paraguay. The bay-ringed tyrannulet was originally described as Leptotriccus sylviolus. Genus Leptotriccus was merged into Phylloscartes in the 1970s. Though relationships among members of Phylloscartes have not been fully resolved, it appears that the bay-ringed tyrannulet's closest relatives are the rufous-lored tyrannulet (P. flaviventris) and the cinnamon-faced tyrannulet (P. parkeri).
The bay-ringed tyrannulet is monotypic. The bay-ringed tyrannulet is about 12 cm (4.7 in) long and weighs about 8 g (0.28 oz). The sexes have the same plumage. Adults are rufous-chestnut at the lores whose color extends to a wide eye-ring. The upper part of their face is olive and the lower part pale yellow. Their crown and upperparts are bright olive. Their wings are dusky with olive edges on the flight feathers. Their wing coverts are dusky with pale yellow tips that form a wing bar. Their tail is dusky with olive edges to the feathers. Their chin is yellow, their throat a paler yellow, and... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Iguaçu National Park | 🇧🇷 Brazil | |
| 2 | Iguazú National Park | 🇦🇷 Argentina |
Rare
Under 5% of wildlife watchers report a Bay-ringed Tyrannulet sighting in Iguazú National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 338th most-seen of the 343 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Bay-ringed 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 Bay-ringed Tyrannulet sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Bay-ringed Tyrannulet sightings, Iguazú National Park ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Iguaçu National Park (Brazil, under 5%).
GBIF citizen-science records
It is estimated from how often the Bay-ringed Tyrannulet is recorded against all the birds logged in Iguazú National Park (6 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.
