Streptoprocne biscutata
Silhouette: Aviceda (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~10% in a week ~30%
The biscutate swift (Streptoprocne biscutata) is a species of bird in subfamily Cypseloidinae of the swift family Apodidae. It is found in Argentina, Bolivia, Brazil, and possibly Paraguay. The biscutate swift is about 22 cm (8.7 in) long and weighs about 115 g (4.1 oz). It has an almost square tail and the sexes have the same plumage. Adults of the nominate subspecies have a sooty brown head that is lighter on the forehead, chin, and around the eyes. Their body is sooty blackish brown except for a wide white band across the breast and a narrow white band on the nape and somewhat on the sides of the neck; the bands do not meet. The wing and tail feathers are blackish on their outer webs and pale gray brown on the inner ones. Juveniles are similar to adults with the addition of grayish white edges to the belly feathers and the tips of the tail. Subspecies S. b. seridoensis has essentially the same plumage as the nominate but is smaller.
The nominate subspecies of biscutate swift is found from Minas Gerais in southeastern... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chapada Diamantina National Park | 🇧🇷 Brazil | |
| 2 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 3 | Chapada dos Guimarães National Park | 🇧🇷 Brazil | |
| 4 | Itatiaia National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Curitiba | 🇧🇷 Brazil | |
| 2 | Belo Horizonte | 🇧🇷 Brazil | |
| 3 | Rio de Janeiro | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Biscutate Swift sighting in Chapada dos Guimarães National Park on a given day, based on 38 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 159th most-seen of the 273 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.
October
In that month about 20% of wildlife watchers report a Biscutate Swift in Chapada dos Guimarães National Park on a given day, against under 5% in January, May–July, September and November, the lowest months. February to April have too few records to rate.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Biscutate Swift 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 Biscutate Swift sightings, Chapada dos Guimarães National Park ranks 3rd at about 10%. The best odds are in Chapada Diamantina National Park (Brazil, about 30%) and Serra dos Órgãos National Park (Brazil, about 10%).
GBIF citizen-science records
It is estimated from how often the Biscutate Swift is recorded against all the birds logged in Chapada dos Guimarães National Park (38 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.
