Bates's Nightjar vs Archbold's Nightjar
Caprimulgus batesi 比較対象 Eurostopodus archboldi
Side-by-Side Comparison
| 属性 | Bates's Nightjar | Archbold's Nightjar |
|---|---|---|
| 学名 | Caprimulgus batesi | Eurostopodus archboldi |
| 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) | 41.0 cm (16.1 in) |
| 体重 | 100.5 g (3.55 oz) | 77.0 g (2.72 oz) |
| 食性 | Nighttime aerial hunter of moths and large beetles; forages in low-level coursing flight above grassland … | Aerial insectivore; catches moths and beetles in nocturnal flight over New Guinea montane forest. |
| 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
Archbold's Nightjar
Rarely recorded; presumed churring nocturnal song; low, resonant trilling typical of genus; vocalizations scarcely documented from highland New Guinea
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.
Archbold's Nightjar
Resident of montane forest in central New Guinea (Snow Mountains and Star Mountains) above 1,500 m; very poorly known.
保全状況
Bates's Nightjar
Archbold's 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.
Archbold's Nightjar
Brown and dark grey with rufous-buff vermiculations; whitish throat patch; pale buff supercilium contrasts with darker crown; no white wing or tail patches; tail barred; New Guinea highlands; few records.
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。
Archbold's Nightjar
ニューギニアの亜高山帯に生息するヨタカで、探検家リチャード・アーチボルドにちなんで命名された。