Spotted Nightjar vs Swallow-tailed Nightjar
Eurostopodus argus 比較対象 Uropsalis segmentata
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Swallow-tailed Nightjar |
|---|---|---|
| 学名 | Eurostopodus argus | Uropsalis segmentata |
| 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) | 32.6 cm (12.8 in) |
| 体重 | 102.5 g (3.62 oz) | 42.25000000000001 g (1.49 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Nocturnal aerial insectivore; catches moths and beetles over Andean montane forest and scrub. |
| 一腹卵数 | 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
Swallow-tailed Nightjar
High, thin churring whistle; reedy 'tsee-tsee' series; calls from Andean forest understory; males conspicuous in display flight; female call softer and shorter
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.
Swallow-tailed Nightjar
Resident of Andean forest edge and open slopes from Colombia and Venezuela south through Ecuador and Peru to Bolivia, at 1,500–3,500 m.
保全状況
Spotted Nightjar
Swallow-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 …
Swallow-tailed Nightjar
Male dark brown with buff and rufous mottling; extraordinarily forked tail with outer feathers extending to 18 cm beyond inner; white throat patch. Female brown and buff mottled without elongated …
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。
Swallow-tailed Nightjar
A small Caprimulgidae nightjar (~42 g) of Andean montane forest edges and paramo from Colombia to Bolivia. Males possess a deeply forked swallow-like tail exceeding body length. Inhabits forest clearings and shrubby paramo. Feeds on moths and beetles at dusk. Least Concern in its montane Andean habitat.