Heinrich's Nightjar vs Scissor-tailed Nightjar
Eurostopodus diabolicus 比較対象 Hydropsalis torquata
Side-by-Side Comparison
| 属性 | Heinrich's Nightjar | Scissor-tailed Nightjar |
|---|---|---|
| 学名 | Eurostopodus diabolicus | Hydropsalis torquata |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 39.9 cm (15.7 in) | 36.8 cm (14.5 in) |
| 体重 | 104.0 g (3.67 oz) | 54.625 g (1.93 oz) |
| 食性 | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. | Catches moths, beetles, and flying insects in aerial sallies at night over South American savanna. |
| 一腹卵数 | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Scissor-tailed Nightjar
Loud, clear churring 'quurrr'; repetitive at moderate pitch; calls from open cerrado at dusk; males call persistently from prominent perches; alarm a sharp 'chek'
Geographic Range & Migration
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
Scissor-tailed Nightjar
Resident of open savanna, cerrado, and scrub from Colombia and Venezuela south through Brazil to Bolivia and northern Argentina.
保全状況
Heinrich's Nightjar
Scissor-tailed Nightjar
How to Tell Them Apart
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.
Scissor-tailed Nightjar
Male with enormously elongated outer tail feathers to 25 cm forming scissors in flight; brown and buff mottled body; white throat; white wing spots. Female brown mottled with normal tail …
About These Birds
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。
Scissor-tailed Nightjar
A medium Caprimulgidae nightjar (~55 g) of open woodland, cerrado, and grassland in eastern and central South America. Males possess spectacularly long scissor-like outer tail feathers. Common around cattle pastures and agricultural land. Feeds on large moths and beetles at night. Least Concern across its broad range.