Silky-tailed Nightjar vs Cayenne Nightjar
Antrostomus sericocaudatus 비교 대상 Setopagis maculosa
Side-by-Side Comparison
| 속성 | Silky-tailed Nightjar | Cayenne Nightjar |
|---|---|---|
| 학명 | Antrostomus sericocaudatus | Setopagis maculosa |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Caprimulgidae | Caprimulgidae |
| 보전 상태 | Least Concern | Data Deficient |
| 체장 | — | — |
| 날개 폭 | 32.1 cm (12.6 in) | 27.8 cm (10.9 in) |
| 체중 | 77.5 g (2.73 oz) | 47.0 g (1.66 oz) |
| 식성 | Hawks moths and beetles in nocturnal aerial sallies over South American lowland and foothill forest. | Catches flying insects in aerial pursuit at night over South American forest and scrub. |
| 산란 수 | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Silky-tailed Nightjar
Whistled, rolling 'pwee-pwee-pwee'; melodic phrase from Amazonian forest; calls persistently at dusk; slightly slurred delivery; alarm a sudden sharp note
Cayenne Nightjar
Poorly known vocalizations; presumed churring trill based on genus; extremely rare recordings; distinct from other Setopagis by subtle tonal and rhythm differences
Geographic Range & Migration
Silky-tailed Nightjar
Resident of lowland and foothill forest in southern Brazil (São Paulo, Minas Gerais, Santa Catarina) and adjacent Paraguay and Argentina.
Cayenne Nightjar
Known from a few specimens from French Guiana; possibly a rare resident of coastal forest and scrub; poorly known.
보전 상태
Silky-tailed Nightjar
Cayenne Nightjar
How to Tell Them Apart
Silky-tailed Nightjar
Brown and buff mottled above with dark vermiculations; white gorget in male; outer tail feathers with silky-white inner webs giving smooth appearance; pale buff below; female with buff gorget and …
Cayenne Nightjar
Brown and buff mottled above with dark vermiculations; pale buff below with darker barring; white throat patch in male; outer tail spots white; data deficient; known from only a handful …
About These Birds
Silky-tailed Nightjar
비단 꼬리 나이트자는 남아메리카 중부와 동부의 아마존 및 세라도 지역에 서식합니다. 비단처럼 부드러운 꼬리 깃털이 특징이며, 삼림 가장자리와 개활 삼림에 서식합니다.
Cayenne Nightjar
A small Caprimulgidae nightjar (~47 g) from coastal French Guiana and adjacent Suriname. Known from only a handful of specimens; biology essentially unknown. Mottled brown plumage presumed cryptic in leaf litter. Presumed nocturnal insectivore. Data Deficient due to extreme rarity of confirmed records in the wild.