Grey Nightjar vs Papuan Nightjar
Caprimulgus jotaka 比較対象 Eurostopodus papuensis
Side-by-Side Comparison
| 属性 | Grey Nightjar | Papuan Nightjar |
|---|---|---|
| 学名 | Caprimulgus jotaka | Eurostopodus papuensis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 40.7 cm (16.0 in) | 37.9 cm (14.9 in) |
| 体重 | 84.4 g (2.98 oz) | 80.5 g (2.84 oz) |
| 食性 | Hawks moths and large insects at dusk and night over East and SE Asian forest … | Hawks large flying insects, especially moths, at night over Papuan forest and savanna. |
| 一腹卵数 | 1-2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Grey Nightjar
Persistent 'cawk-cawk-cawk'; hollow, frog-like notes repeated rapidly; calls from East Asian forests at night; higher-pitched variant churr also given; very persistent caller
Papuan Nightjar
Churring, repetitive nocturnal call; soft bubbling trill; melodic series of hollow notes; calls from low perch or ground in New Guinea lowland forest
Geographic Range & Migration
Grey Nightjar
Breeds in deciduous and mixed forest from far eastern Russia and northern China south to Korea and Japan; winters in southern and Southeast Asia.
Papuan Nightjar
Resident of savanna woodland, grass, and scrub in lowland New Guinea (Papua, Indonesia and Papua New Guinea).
保全状況
Grey Nightjar
Papuan Nightjar
How to Tell Them Apart
Grey Nightjar
Grey-brown above with pale buff vermiculations; grey tones stronger than Jungle Nightjar; white throat patch; white outer wing spots; white outer tail in male; buff throat and tail spots in …
Papuan Nightjar
Dark grey-brown finely vermiculated with buff and black; pale buff and rufous throat patch; pale supercilium; no white wing patches; tail barred brown and buff; cryptically patterned bark-mimicking plumage.
About These Birds
Grey Nightjar
体重約84gの日本・朝鮮・中国東北部の山地林で繁殖し、東南アジアで越冬するヨタカ。鼻音のピョーピョーという鳴き声が特徴。
Papuan Nightjar
ニューギニア南部の低地に生息するヨタカで、体重81g。