Herpsilochmus rufimarginatus
Silhouette: Sheatherius · PhyloPic
In 3 days <5% in a week ~10%
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 |
Rare
Under 5% of wildlife watchers report a Rufous-margined Antwren sighting in São Paulo on a given day, based on 126 verified sightings from GBIF citizen-science data. It is the 176th most-seen of the 353 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 Rufous-margined Antwren in São Paulo 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 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.
4th of 4
Of the 4 cities where we can rate Rufous-margined Antwren sightings, São Paulo ranks 4th at under 5%. The best odds are in Santos (Brazil, about 10%), Rio de Janeiro (Brazil, about 10%) and Niterói (Brazil, under 5%).
GBIF citizen-science records
It is estimated from how often the Rufous-margined Antwren is recorded against all the birds logged in São Paulo (126 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.
