Arremon taciturnus
Silhouette: Juan Camilo Cepeda-Duque · PhyloPic
In 3 days ~10% in a week ~20%
The pectoral sparrow (Arremon taciturnus) is a small species of New World sparrow first described in 1779 by Georges-Louis Leclerc. It has two subspecies. Like other sparrows in its family Arremon, it has pale green-to-olive wings, a distinctive black band going across its breast, however in subspecies nigrirostris it is not continuous and instead breaks in the center. It is found throughout southeastern South America, in subtropical or tropical moist lowland forests. The phenology of its breeding is unknown, however it has been observed nest building as early as August and as late as December. Incubation takes 15–17 days, however the duration of the nestling and fledgling stages are unknown due to a lack of research. It is omnivorous, mainly eating insects and seeds, and are considered a least-concern species by BirdLife International due to its large population and range.
The pectoral sparrow was described in 1779 by French polymath Georges-Louis Leclerc, Comte de Buffon in his Histoire Naturelle des Oiseaux under the French name L'Oiseau Silencieux, meaning "the silent bird". It was also illustrated in a hand-colored plate that was produced to accompany Buffon's book... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manu National Park | 🇵🇪 Peru | |
| 2 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 3 | Chapada dos Guimarães National Park | 🇧🇷 Brazil | |
| 4 | Sierra de la Macarena National Park | 🇨🇴 Colombia | |
| 5 | Chapada Diamantina National Park | 🇧🇷 Brazil | |
| 6 | Amboró National Park | 🇧🇴 Bolivia | |
| 7 | Tambopata National Reserve | 🇵🇪 Peru |
Rare
Under 5% of wildlife watchers report a Pectoral Sparrow sighting in Chapada Diamantina National Park on a given day, based on 18 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 197th 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 20%, if each day is a fresh chance.
April–June and September–October
In those months about 10% of wildlife watchers report a Pectoral Sparrow in Chapada Diamantina National Park on a given day, against under 5% in July–August and November–March, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Pectoral Sparrow sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 7
Of the 7 parks where we can rate Pectoral Sparrow sightings, Chapada Diamantina National Park ranks 5th at under 5%. The best odds are in Manu National Park (Peru, about 10%), Brownsberg Nature Park (Suriname, about 10%) and Chapada dos Guimarães National Park (Brazil, about 10%).
Same family: Passerellidae
The closest relatives of the Pectoral Sparrow that you can see in Chapada Diamantina National Park (family Passerellidae, New World Sparrows) are Rufous-collared Sparrow (about 60%) and Grassland Sparrow (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pectoral Sparrow is recorded against all the birds logged in Chapada Diamantina National Park (18 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.
