Formicivora melanogaster
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~30%
The black-bellied antwren (Formicivora melanogaster) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, and Paraguay. The black-bellied antwren was described by the Austrian ornithologist August von Pelzeln in 1868 and given its current binomial name Formicivora melanogaster. It and the serra antwren (F. serrana) are sister species.
The black-bellied antwren is 12 to 14 cm (4.7 to 5.5 in) long. Adult males of the nominate subspecies have a wide white supercilium that extends down the neck, along the side of the breast, and widens on the flanks. Their crown and upperparts are dark grayish brown with white edges on the outer scapulars and a hidden white patch between them. Their wings are blackish with white tips on the coverts. Their tail is black with white feather tips that increase in size from the central to the outer feathers. Their face, throat, and underparts are black with white underwing coverts. Adult females have a browner... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chapada Diamantina National Park | 🇧🇷 Brazil |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Black-bellied Antwren sighting in Chapada Diamantina National Park on a given day, based on 26 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 178th most-seen of the 271 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
April and October–November
In those months about 10% of wildlife watchers report a Black-bellied Antwren in Chapada Diamantina National Park on a given day, against under 5% in May–September and December–March, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Black-bellied 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.
Only Chapada Diamantina National Park, in our data
Chapada Diamantina National Park is the only park on Wallace's Line with enough records to rate Black-bellied Antwren sightings: under 5% of wildlife watchers there report one on a given day.
Same genus: Formicivora
The closest relatives of the Black-bellied Antwren that you can see in Chapada Diamantina National Park (genus Formicivora, Black-bellied Antwrens) are Sincorá Antwren (about 40%) and Rusty-backed Antwren (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-bellied Antwren is recorded against all the birds logged in Chapada Diamantina National Park (26 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.
