Slender-tailed Nightjar vs Spotted Nightjar
Caprimulgus clarus مقارنةً بـ Eurostopodus argus
Side-by-Side Comparison
| السمة | Slender-tailed Nightjar | Spotted Nightjar |
|---|---|---|
| الاسم العلمي | Caprimulgus clarus | Eurostopodus argus |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Caprimulgidae | Caprimulgidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 29,6 cm (11.7 in) | 42,7 cm (16.8 in) |
| الوزن | 43,0 g (1.52 oz) | 102,5 g (3.62 oz) |
| النظام الغذائي | Nocturnal aerial insectivore specialising in large moths and flying beetles, caught in slow erratic hunting … | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … |
| عدد البيض في الوضع | 2 | 1 |
| Population Trend | — | — |
Habitat Comparison
الموائل المشتركة
Slender-tailed Nightjar only
بلا
Spotted Nightjar only
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'
Spotted Nightjar
Loud churring 'good-lord-deliver-us' repeated at dusk; melodic bubbling quality; also emits hollow 'cow-cow-cow' series and soft frog-like croaking
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.
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
حالة الحفاظ
Slender-tailed Nightjar
Spotted 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.
Spotted Nightjar
Cryptically mottled grey-brown, rufous, and black with intricate vermiculations; distinctive large white spots on wing coverts; white throat patch; no white in wings or tail. Sexes similar with slight pattern …
About These Birds
Slender-tailed Nightjar
A slender nightjar (24-27 cm including elongated tail) of open grassland and woodland edges in eastern and southern Africa. Similar to Long-tailed Nightjar but with paler plumage and finer markings. Nocturnal insectivore. Resident or short-distance migrant.
Spotted Nightjar
A medium Caprimulgidae nightjar (~103 g) of open woodland, spinifex grassland, and rocky ridges across mainland Australia. Intricately spotted and barred brown, grey, and buff. Cryptic by day on the ground among leaf litter. Crepuscular and nocturnal; feeds on flying insects caught in aerial pursuit. Least Concern.