Tawny-collared Nightjar vs Papuan Nightjar
Antrostomus salvini 比較対象 Eurostopodus papuensis
Side-by-Side Comparison
| 属性 | Tawny-collared Nightjar | Papuan Nightjar |
|---|---|---|
| 学名 | Antrostomus salvini | Eurostopodus papuensis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 33.8 cm (13.3 in) | 37.9 cm (14.9 in) |
| 体重 | 56.0 g (1.98 oz) | 80.5 g (2.84 oz) |
| 食性 | Aerial insectivore; hawks moths and beetles at night over Central American forest and forest edge. | Hawks large flying insects, especially moths, at night over Papuan forest and savanna. |
| 一腹卵数 | 2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Tawny-collared Nightjar
Loud 'WHEEP' or 'weet' repeated at intervals; sharp, whistled call; carries through Mexican highland forest; higher-pitched than Chuck-will's-widow; distinctive sharp quality
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
Tawny-collared Nightjar
Resident of tropical dry forest and scrub in eastern Mexico (Veracruz, Oaxaca, Tabasco) and northern Central America.
Papuan Nightjar
Resident of savanna woodland, grass, and scrub in lowland New Guinea (Papua, Indonesia and Papua New Guinea).
保全状況
Tawny-collared Nightjar
Papuan Nightjar
How to Tell Them Apart
Tawny-collared Nightjar
Brown and buff mottled above; distinctive tawny-buff collar encircling hindneck diagnostic; white gorget in male; pale buff underparts with dark barring; white outer tail spots in male; Mexican dry forests.
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
Tawny-collared Nightjar
A medium-small Caprimulgidae nightjar (~56 g) of humid foothill and montane forest edges in northeastern Mexico, Guatemala, Belize, and Honduras. Named for its tawny hindneck collar. Brown-mottled plumage; males have white tail corners. Roosts on the ground; feeds nocturnally on insects. Least Concern.
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。