Herpsilochmus rufimarginatus
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~40%
The rufous-margined antwren (Herpsilochmus rufimarginatus) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds." It is found in Argentina, Brazil, and Paraguay. The rufous-margined antwren was described by the Dutch zoologist Coenraad Jacob Temminck in 1822 and given the binomial name Myiothera rufimarginata. It is now placed in the genus Herpsilochmus which was introduced by the German ornithologist Jean Cabanis in 1847.
The specific epithet rufimarginatus is from the Latin rufus "rufous" and marginatus "marginned" or "bordered." The rufous-margined antwren's taxonomy is unsettled. Before 2020 the American Ornithological Society, the International Ornithological Committee, and the Clements taxonomy treated it and what is now the rusty-winged antwren (Herpsilochmus frater) as a single species, the rufous-winged antwren with the binomial H. rufimarginatus.
These systems assigned it four subspecies: Beginning in 2020 these systems split the rufous-winged antwren... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Iguaçu National Park | 🇧🇷 Brazil | |
| 4 | Tijuca National Park | 🇧🇷 Brazil | |
| 5 | Itatiaia National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santos | 🇧🇷 Brazil | |
| 2 | Rio de Janeiro | 🇧🇷 Brazil | |
| 3 | Niterói | 🇧🇷 Brazil | |
| 4 | São Paulo | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Rufous-margined Antwren sighting in Rio de Janeiro on a given day, based on 268 verified sightings from GBIF citizen-science data. It is the 78th most-seen of the 278 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
January–February, April–September and November
In those months about 10% of wildlife watchers report a Rufous-margined Antwren in Rio de Janeiro on a given day, against under 5% in March, October and December, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Rufous-margined Antwren sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 cities where we can rate Rufous-margined Antwren sightings, Rio de Janeiro ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Santos (Brazil, about 10%).
Same family: Thamnophilidae
The closest relatives of the Rufous-margined Antwren that you can see in Rio de Janeiro (family Thamnophilidae, Typical Antbirds) are Chestnut-backed Antshrike (about 20%), White-flanked Antwren (about 10%) and Sooretama Slaty-Antshrike (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rufous-margined Antwren is recorded against all the birds logged in Rio de Janeiro (268 verified sightings), 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.
