Herpsilochmus longirostris
Silhouette: Sheatherius · PhyloPic
In 3 days ~10%
The large-billed antwren (Herpsilochmus longirostris) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia and Brazil. The large-billed antwren was described by the Austrian ornithologist August von Pelzeln in 1868 and given its current binomial name Herpsilochmus longirostris. Its relationship to others of its genus is unclear but it apparently is most closely related to the pectoral antwren (H. pectoralis), and at least one author has considered them to form a superspecies.
The large-billed antwren is monotypic. The large-billed antwren is 12 to 13 cm (4.7 to 5.1 in) long and weighs 12 to 14 g (0.42 to 0.49 oz). As its English name and specific epithet imply, its bill is heavier than those of most other Herpsilochmus antwrens. Adult males have a black crown and nape, a long whitish supercilium, a narrow black streak through the eye, and grayish ear coverts. Their back and rump are gray with a black and white patch between the scapulars and white-tipped black uppertail coverts. Their wings are black with white-tipped coverts and flight feathers with white edges towards... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Emas National Park | 🇧🇷 Brazil | |
| 2 | Chapada dos Guimarães National Park | 🇧🇷 Brazil | |
| 3 | Parque Estadual Encontro das Águas | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Campo Grande | 🇧🇷 Brazil | |
| 2 | Goiânia | 🇧🇷 Brazil | |
| 3 | Brasilia | 🇧🇷 Brazil |
Rare
Under 5% of wildlife watchers report a Large-billed Antwren sighting in Parque Estadual Encontro das Águas on a given day, based on 36 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 211th most-seen of the 308 birds we can rate there. Over three days the chance rises 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 Large-billed Antwren in Parque Estadual Encontro das Águas on a given day, so our monthly data shows no clear season. January to April have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Large-billed 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 3
Of the 3 parks where we can rate Large-billed Antwren sightings, Parque Estadual Encontro das Águas ranks 3rd at under 5%. The best odds are in Emas National Park (Brazil, about 30%) and Chapada dos Guimarães National Park (Brazil, about 20%).
Same family: Thamnophilidae
The closest relatives of the Large-billed Antwren that you can see in Parque Estadual Encontro das Águas (family Thamnophilidae, Typical Antbirds) are Great Antshrike (about 20%), Mato Grosso Antbird (about 20%) and Barred Antshrike (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Large-billed Antwren is recorded against all the birds logged in Parque Estadual Encontro das Águas (36 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.
