Herpsilochmus frater
Silhouette: Sheatherius · PhyloPic
In 3 days <5% in a week ~10%
The rusty-winged antwren (Herpsilochmus frater) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, Colombia, Ecuador, Guyana, Panama, Peru, Suriname, and Venezuela.
The rusty-winged 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 rufous-margined antwren (Herpsilochmus rufimarginatus) 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 into the two current species. They assigned subspecies exiguus and frater to the rusty-winged antwren and merged scapularis into rufimarginatus as the monotypic rufous-margined antwren.
However, by 2018 BirdLife International's Handbook of the Birds of the World (HBW) had split the rufous-winged antwren into the "northern rufous-winged... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Darién National Park | 🇵🇦 Panama | |
| 2 | Henri Pittier National Park | 🇻🇪 Venezuela | |
| 3 | Amboró National Park | 🇧🇴 Bolivia | |
| 4 | Sierra de la Macarena National Park | 🇨🇴 Colombia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | João Pessoa | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Rusty-winged Antwren sighting in Amboró National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 255th most-seen of the 273 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 Rusty-winged Antwren in Amboró National Park on a given day, so our monthly data shows no clear season. June has too few records to rate.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Rusty-winged Antwren sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 4
Of the 4 parks where we can rate Rusty-winged Antwren sightings, Amboró National Park ranks 3rd at under 5%. The best odds are in Darién National Park (Panama, about 10%) and Henri Pittier National Park (Venezuela, under 5%).
GBIF citizen-science records
It is estimated from how often the Rusty-winged Antwren is recorded against all the birds logged in Amboró National Park (5 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.
