Jerdon's Nightjar vs Heinrich's Nightjar
Caprimulgus atripennis 比較対象 Eurostopodus diabolicus
Side-by-Side Comparison
| 属性 | Jerdon's Nightjar | Heinrich's Nightjar |
|---|---|---|
| 学名 | Caprimulgus atripennis | Eurostopodus diabolicus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 36.8 cm (14.5 in) | 39.9 cm (15.7 in) |
| 体重 | 58.0 g (2.05 oz) | 104.0 g (3.67 oz) |
| 食性 | Nighttime insectivore catching large moths and beetles in sweeping aerial sallies over rocky hillsides and … | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. |
| 一腹卵数 | 2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Jerdon's Nightjar
Loud 'chuck-chuck-chuck-rrr'; hollow knocking 'chuck' notes preceding long trill; calls from South Indian scrub and forest edges; repeats phrase persistently at dusk
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Geographic Range & Migration
Jerdon's Nightjar
Found across peninsular India and Sri Lanka, north to Nepal. Resident in dry deciduous forest, scrub jungle, and rocky terrain below 1,500 m.
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
保全状況
Jerdon's Nightjar
Heinrich's Nightjar
How to Tell Them Apart
Jerdon's Nightjar
Dark brownish-black upperparts with pale buff vermiculations; whitish supercilium and moustachial stripe; throat patch white; dark wings with buff-spotted coverts; lacks bold white wing patches of some relatives.
Heinrich's Nightjar
Rufous-brown and dark brown mottled with buff vermiculations; large pale buff throat patch; pale buff supercilium; no white wing markings; tail darkly barred brown and buff. Poorly known; Sulawesi endemic.
About These Birds
Jerdon's Nightjar
体長24〜26cmの南インド・スリランカの岩場の丘陵地に生息するヨタカ。ゴロゴロという鳴き声が特徴。
Heinrich's Nightjar
スラウェシ島固有のヨタカで、体重104g。「悪魔のヨタカ」という名で知られる。