Bates's Nightjar vs Spotted Nightjar
Caprimulgus batesi 比較対象 Eurostopodus argus
Side-by-Side Comparison
| 属性 | Bates's Nightjar | Spotted Nightjar |
|---|---|---|
| 学名 | Caprimulgus batesi | Eurostopodus argus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 37.1 cm (14.6 in) | 42.7 cm (16.8 in) |
| 体重 | 100.5 g (3.55 oz) | 102.5 g (3.62 oz) |
| 食性 | Nighttime aerial hunter of moths and large beetles; forages in low-level coursing flight above grassland … | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … |
| 一腹卵数 | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Bates's Nightjar
Deep, resonant churring trill; one of larger African Caprimulgus; low hollow 'churrrr' from Central African rainforest; calls at night from dense lowland forest
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
Geographic Range & Migration
Bates's Nightjar
Found across West Africa from Gambia east to Sudan and south to the DRC. Resident in open savanna. Male has spectacular elongated tail feathers.
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
保全状況
Bates's Nightjar
Spotted Nightjar
How to Tell Them Apart
Bates's Nightjar
Large and very dark; blackish-brown upperparts with minimal pale patterning; small white throat spot; underparts dark brown with buff barring; one of the darkest nightjars, inhabiting dense Central African rainforests.
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 …
About These Birds
Bates's Nightjar
体長24〜26cmのギニア湾岸西・中央アフリカの低地一次雨林に生息するヨタカ。生態の詳細は不明。
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。