Great Dusky Swift

Great Dusky Swift

Cypseloides senex

Silhouette: vectorized by Rob Sparks · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability <5% · Rare
at Chapada dos Guimarães National Park
38 Verified sightings at Chapada dos Guimarães National Park From 2019 to 2026
4,891 Verified sightings across all 6 parks From 2019 to 2026
October Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Great Dusky Swift

The great dusky swift (Cypseloides senex) is a species of bird in subfamily Cypseloidinae of the swift family Apodidae. It is found in Argentina, Brazil, Paraguay, and possibly Bolivia. The great dusky swift is monotypic.

The great dusky swift is the largest member of genus Cypseloides. It is 18 cm (7.1 in) long and weighs 56 to 110 g (2.0 to 3.9 oz). The sexes have the same plumage. Adults have a chocolate brown crown and throat with pale gray edges to the feathers, giving a frosted appearance to the face. Their back is a darker brown, their rump a brown intermediate between the head and back, and their tail blackish brown. Their undersides are a paler brown than the back. The upper side of the wing is mostly brown and the underside somewhat lighter. Juveniles are very similar to adults with the addition on pale fringes to the wing feathers.

The great dusky swift is found in Brazil from southern Pará and much of Mato Grosso east into Bahia and south to Rio Grande do Sul, in eastern Paraguay, and in northeastern Argentina's Misiones Province. Undocumented sight records in Bolivia lead the South American... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Iguaçu National Park 🇧🇷 Brazil
~40%
2 Iguazú National Park 🇦🇷 Argentina
~40%
3 Serra da Canastra National Park 🇧🇷 Brazil
~20%
4 Chapada dos Guimarães National Park 🇧🇷 Brazil
<5%
5 Emas National Park 🇧🇷 Brazil
<5%
6 Parque Estadual Encontro das Águas 🇧🇷 Brazil
Insufficient data

Quick answers

What are the chances of seeing a Great Dusky Swift in Chapada dos Guimarães National Park?

Under 5% of wildlife watchers report a Great Dusky Swift sighting in Chapada dos Guimarães National Park, based on 38 verified sightings from GBIF citizen-science data.

When is the best time to see Great Dusky Swift in Chapada dos Guimarães National Park?

October has the highest sighting rate for Great Dusky Swift in Chapada dos Guimarães National Park in our monthly data.

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