Streptoprocne biscutata
Silhouette: Aviceda (vectorized by T. Michael Keesey) · PhyloPic
In 3 days <5%
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 |
Rare
Under 5% of wildlife watchers report a Biscutate Swift sighting in Rio de Janeiro on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 265th most-seen of the 278 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Biscutate Swift in Rio de Janeiro on a given day, so our monthly data shows no clear season.
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.
Among the best
Of the 3 cities where we can rate Biscutate Swift sightings, Rio de Janeiro ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Curitiba (Brazil, under 5%) and Belo Horizonte (Brazil, under 5%).
GBIF citizen-science records
It is estimated from how often the Biscutate Swift is recorded against all the birds logged in Rio de Janeiro (7 verified sightings), 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.
