Slender-tailed Nightjar vs Cayenne Nightjar
Caprimulgus clarus 对比 Setopagis maculosa
Side-by-Side Comparison
| 属性 | Slender-tailed Nightjar | Cayenne Nightjar |
|---|---|---|
| 学名 | Caprimulgus clarus | Setopagis maculosa |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保护状况 | Least Concern | Data Deficient |
| 体长 | — | — |
| 翼展 | 29.6 cm (11.7 in) | 27.8 cm (10.9 in) |
| 体重 | 43.0 g (1.52 oz) | 47.0 g (1.66 oz) |
| 食性 | Nocturnal aerial insectivore specialising in large moths and flying beetles, caught in slow erratic hunting … | Catches flying insects in aerial pursuit at night over South American forest and scrub. |
| 产卵数 | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Slender-tailed Nightjar
Rapid churring trill; 'trrr-trrr' at steady pace; calls from East African dry scrub at night; lighter than Long-tailed Nightjar; alarm a quiet 'chek'
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
Slender-tailed Nightjar
Found from Angola and the DRC south through Zambia and Zimbabwe to South Africa. Resident in woodland and savanna near rocky outcrops.
Cayenne Nightjar
Known from a few specimens from French Guiana; possibly a rare resident of coastal forest and scrub; poorly known.
保护状况
Slender-tailed Nightjar
Cayenne Nightjar
How to Tell Them Apart
Slender-tailed Nightjar
Pale brown upperparts with black streaks and buff-white spotting; whitish supercilium; white throat patch; underparts buff barred brown; males have elongated but narrower tail feathers than Long-tailed Nightjar.
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
Slender-tailed Nightjar
细尾夜鹰，体长24–27厘米，分布于东非和南非开阔草地和林地，色调较长尾夜鹰浅。
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.