Spotted Nightjar vs Least Poorwill
Eurostopodus argus 比較対象 Siphonorhis brewsteri
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Least Poorwill |
|---|---|---|
| 学名 | Eurostopodus argus | Siphonorhis brewsteri |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Near Threatened |
| 体長 | — | — |
| 翼開長 | 42.7 cm (16.8 in) | 22.7 cm (8.9 in) |
| 体重 | 102.5 g (3.62 oz) | 44.0 g (1.55 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Nocturnal aerial insectivore; catches small flying insects near ground over Hispaniolan dry scrub. |
| 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
Least Poorwill
Soft, melodic 'poor-will' whistle; gentle and repetitive; calls from dry scrub at night; higher-pitched than Common Poorwill; subtle and often overlooked
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.
Least Poorwill
Endemic to Hispaniola (Haiti and Dominican Republic); resident of open dry forest and scrub; rare and sparsely distributed.
保全状況
Spotted Nightjar
Least Poorwill
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 …
Least Poorwill
Small; brown and buff mottled with fine dark vermiculations; pale buff throat bordered by dark lateral spots; buff and dark barred tail; no white in wings or tail; male with …
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。
Least Poorwill
A small Caprimulgidae poorwill (~44 g) of dry scrub and thorn woodland in Hispaniola. Brown-and-buff cryptic plumage. Little studied; biology poorly known for this island endemic. Feeds on insects at night. Near Threatened owing to ongoing habitat degradation and deforestation on Hispaniola. Rarely encountered.