Euscarthmus rufomarginatus
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~40% in a week ~70%
The rufous-sided scrub tyrant, or rufous-sided pygmy-tyrant, (Euscarthmus rufomarginatus) is a species of bird in the family Tyrannidae. It is found in Bolivia, Brazil, Paraguay, and Suriname. Taxonomists previously called the rufous-sided scrub tyrant the "rufous-sided pygmy tyrant or pygmy-tyrant". Beginning in 2021 most systems changed the common names of all three Euscarthmus species to scrub tyrant (or scrub-tyrant) to avoid confusion with other, unrelated, species called "pygmy tyrants". However, as of late 2024 BirdLife International's Handbook of the Birds of the World retains the "pygmy-tyrant" common name for it.
The rufous-sided scrub tyrant is monotypic. The rufous-sided scrub tyrant is 9.0 to 11.5 cm (3.5 to 4.5 in) long and weighs about 6 g (0.21 oz). The sexes have the same plumage. Adults have a brown crown with a small cinnamon-rufous central patch that is somewhat hidden. They have a whitish supercilium and eye-ring on an otherwise light brown face. Their upperparts are brown. Their wings are a darker brown than the upperparts with ocraceous tips on the coverts that show as two wing bars; the inner flight feathers have... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Emas National Park | 🇧🇷 Brazil | |
| 2 | Chapada Diamantina National Park | 🇧🇷 Brazil |
Possible
About 20% of wildlife watchers report a Rufous-sided Pygmy-Tyrant sighting in Chapada Diamantina National Park on a given day, based on 153 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 83rd most-seen of the 271 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report a Rufous-sided Pygmy-Tyrant in Chapada Diamantina National Park on a given day, against about 10% in February, June, August and October, the lowest months. That is one of Chapada Diamantina National Park's driest months, with about 55 mm of rain against 180 mm in November.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Rufous-sided Pygmy-Tyrant 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 2
Of the 2 parks where we can rate Rufous-sided Pygmy-Tyrant sightings, Chapada Diamantina National Park ranks 2nd at about 20%. The best odds are in Emas National Park (Brazil, about 30%).
GBIF citizen-science records
It is estimated from how often the Rufous-sided Pygmy-Tyrant is recorded against all the birds logged in Chapada Diamantina National Park (153 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.
