Spotted Nightjar vs Blackish Nightjar
Eurostopodus argus 对比 Nyctipolus nigrescens
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Blackish Nightjar |
|---|---|---|
| 学名 | Eurostopodus argus | Nyctipolus nigrescens |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 42.7 cm (16.8 in) | 27.6 cm (10.9 in) |
| 体重 | 102.5 g (3.62 oz) | 35.625 g (1.26 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Nocturnal aerial insectivore; catches moths and small beetles in flight over South American forest and … |
| 产卵数 | 1 | 1 |
| 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
Blackish Nightjar
Soft, purring 'churr' at low volume; gentle repetitive trill from rocky substrate; calls modestly at dusk; alarm a sharp 'chek'; blends with dark rocky habitat
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.
Blackish Nightjar
Resident of rocky outcrops, open woodland, and savanna in northern South America from Venezuela and the Guianas to Colombia and northern Brazil.
保护状况
Spotted Nightjar
Blackish 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 …
Blackish Nightjar
Uniformly dark sooty-brown with fine buff and rufous vermiculations; pale buff throat patch; no white wing patches or tail spots; one of the darkest nightjars; closely resembles dark rocky substrates …
About These Birds
Spotted Nightjar
中型夜鹰（约103克）。栖息于澳大利亚大陆的开阔林地和纺锤草草地。无危。
Blackish Nightjar
A small, very dark Caprimulgidae nightjar (~36 g) of rocky outcrops and boulder-strewn habitat in northern South America from Venezuela to northeastern Brazil. Dark sooty-brown plumage blends with dark rocks. Roosts motionless on stones by day. Hunts small insects at night. Least Concern in its rocky habitat.