Spotted Nightjar vs Lesser Band-winged Nightjar
Eurostopodus argus 比較対象 Systellura decussata
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Lesser Band-winged Nightjar |
|---|---|---|
| 学名 | Eurostopodus argus | Systellura decussata |
| 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) | 26.6 cm (10.5 in) |
| 体重 | 102.5 g (3.62 oz) | 31.833333333333332 g (1.12 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Hawks flying insects at night over Andean and coastal scrub of Peru and northern Chile. |
| 一腹卵数 | 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
Lesser Band-winged Nightjar
Soft 'tyuk' phrases; lighter and higher than Greater Band-winged; gentle churring trill; calls from Pacific coastal scrub at dusk; thin, reedy alarm note
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.
Lesser Band-winged Nightjar
Resident of desert scrub, rocky hillsides, and coastal pampas in Peru and northern Chile; closely associated with arid Pacific slope.
保全状況
Spotted Nightjar
Lesser Band-winged 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 …
Lesser Band-winged Nightjar
Smaller than Greater Band-winged; brown and buff mottled with dark vermiculations; white wing bar across primaries; white throat in male; buff throat in female; white outer tail spots in male; …
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。
Lesser Band-winged Nightjar
A very small Caprimulgidae nightjar (~32 g) of coastal desert scrub and rocky slopes in Peru and northern Chile. Pale-buffy with fine vermiculations and a paler wing band. Restricted to very arid Pacific-slope habitats. Nocturnal; feeds on small insects. Little studied; Least Concern in its specialised desert range.