Sombre Nightjar vs Heinrich's Nightjar
Caprimulgus fraenatus 比較対象 Eurostopodus diabolicus
Side-by-Side Comparison
| 属性 | Sombre Nightjar | Heinrich's Nightjar |
|---|---|---|
| 学名 | Caprimulgus fraenatus | Eurostopodus diabolicus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 32.4 cm (12.8 in) | 39.9 cm (15.7 in) |
| 体重 | 60.0 g (2.12 oz) | 104.0 g (3.67 oz) |
| 食性 | Feeds at night on flying insects including moths and beetles; hunts with buoyant erratic flight … | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. |
| 一腹卵数 | 1-2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Sombre Nightjar
Monotonous churring trill; repetitive 'churr' at moderate tempo from East African scrub; lower-pitched and less musical than some relatives; calls persistently at night
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Geographic Range & Migration
Sombre Nightjar
Found across East Africa from Ethiopia and Somalia south to Tanzania. Resident in dry acacia scrub, thornbush, and arid savanna at low elevations.
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
保全状況
Sombre Nightjar
Heinrich's Nightjar
How to Tell Them Apart
Sombre Nightjar
Uniformly dark sooty-brown upperparts with dense blackish vermiculations; pale buff supercilium and narrow white submoustachial stripe; underparts barred buff and dark brown. Sexes similar.
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
Sombre Nightjar
体長23〜25cmのエチオピアから南アフリカのサハラ以南に生息するヨタカ。開けた林地・サバンナに生息する。
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。