Spotted Nightjar vs Roraiman Nightjar
Eurostopodus argus مقارنةً بـ Setopagis whitelyi
Side-by-Side Comparison
| السمة | Spotted Nightjar | Roraiman Nightjar |
|---|---|---|
| الاسم العلمي | Eurostopodus argus | Setopagis whitelyi |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Caprimulgidae | Caprimulgidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 42,7 cm (16.8 in) | 31,1 cm (12.2 in) |
| الوزن | 102,5 g (3.62 oz) | 40,75 g (1.44 oz) |
| النظام الغذائي | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Nocturnal aerial insectivore; hawks insects over Tepui highland forest and savanna of Venezuela and Guyana. |
| عدد البيض في الوضع | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
Roraiman Nightjar
Churring phrases at moderate pace; rasping trill from tepui scrub and forest edges; slightly deeper than Little Nightjar; calls at dusk from rocky highland terrain
Geographic Range & Migration
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
Roraiman Nightjar
Endemic to the Roraima highlands of Venezuela and adjacent northwestern Brazil (Gran Sabana and tepuis), above 1,000 m.
حالة الحفاظ
Spotted Nightjar
Roraiman Nightjar
How to Tell Them Apart
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 …
Roraiman Nightjar
Warm rufous-brown and dark brown mottled above; pale buff below with dark barring; white throat patch in male; white outer tail spots in male; buff throat in female; tepui highlands …
About These Birds
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.
Roraiman Nightjar
A small Caprimulgidae nightjar (~41 g) restricted to the tepui highlands of Venezuela, Guyana, and adjacent Brazil, typically above 1,000 m. Named for Mount Roraima. Cryptic brown-patterned plumage. Nocturnal aerial insectivore. Inhabits rocky scrub and forest edges at elevation. Least Concern in its remote tepui range.