Antrostomus sericocaudatus
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~30%
The silky-tailed nightjar (Antrostomus sericocaudatus) is a species of nightjar birds in the family Caprimulgidae. It is found in Brazil, Argentina, Bolivia, Paraguay, and Peru. Its natural habitat is subtropical or tropical moist lowland forests.
The silky-tailed nightjar has two subspecies, the nominate Antrostomus sericocaudatus sericocaudatus and A. s. mengeli. At one time the tawny-collared nightjar (A. salvini) and Yucatan nightjar (A. badius) were also treated as subspecies of it.
The adult male silky-tailed nightjar has light grey-brown, vermiculated plumage with a strong blackish streak on the top of the head and the nape. It has blackish facial bristles and blackish spots with rufous on the side. Its hind-neck has narrow rufous-tawny half-collar plumage. The mantle, back, rump, and upper tail of a silky-tailed nightjar converts to blackish-brown with irregular patterns of buff and cinnamon. The breast is blackish-brown with short narrow bars of cinnamon and the belly is blackish-brown with blotches and irregular narrow bars of buff.
The nominate subspecies of silky-tailed nightjar is found in the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Amacayacu National Natural Park | 🇨🇴 Colombia | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Manu National Park | 🇵🇪 Peru | |
| 4 | Iguaçu National Park | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Silky-tailed Nightjar sighting in Amacayacu National Natural Park on a given day, based on 46 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 233rd most-seen of the 436 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report a Silky-tailed Nightjar in Amacayacu National Natural Park on a given day, against under 5% in March, July–August and November–January, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Silky-tailed Nightjar sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 4 parks where we can rate Silky-tailed Nightjar sightings, Amacayacu National Natural Park has the highest daily chance: about 10%. Next come Iguazú National Park (Argentina, under 5%) and Manu National Park (Peru, under 5%).
GBIF citizen-science records
It is estimated from how often the Silky-tailed Nightjar is recorded against all the birds logged in Amacayacu National Natural Park (46 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.
