Spotted Nightjar vs Scissor-tailed Nightjar
Eurostopodus argus 比較対象 Hydropsalis torquata
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Scissor-tailed Nightjar |
|---|---|---|
| 学名 | Eurostopodus argus | Hydropsalis torquata |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 42.7 cm (16.8 in) | 36.8 cm (14.5 in) |
| 体重 | 102.5 g (3.62 oz) | 54.625 g (1.93 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Catches moths, beetles, and flying insects in aerial sallies at night over South American savanna. |
| 一腹卵数 | 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
Scissor-tailed Nightjar
Loud, clear churring 'quurrr'; repetitive at moderate pitch; calls from open cerrado at dusk; males call persistently from prominent perches; alarm a sharp 'chek'
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.
Scissor-tailed Nightjar
Resident of open savanna, cerrado, and scrub from Colombia and Venezuela south through Brazil to Bolivia and northern Argentina.
保全状況
Spotted Nightjar
Scissor-tailed 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 …
Scissor-tailed Nightjar
Male with enormously elongated outer tail feathers to 25 cm forming scissors in flight; brown and buff mottled body; white throat; white wing spots. Female brown mottled with normal tail …
About These Birds
Spotted Nightjar
オーストラリア本土のスピニフェックス草原に生息するヨタカで、体重103g。
Scissor-tailed Nightjar
A medium Caprimulgidae nightjar (~55 g) of open woodland, cerrado, and grassland in eastern and central South America. Males possess spectacularly long scissor-like outer tail feathers. Common around cattle pastures and agricultural land. Feeds on large moths and beetles at night. Least Concern across its broad range.