Archbold's Nightjar vs Rufous-bellied Nighthawk
Eurostopodus archboldi so với Lurocalis rufiventris
Side-by-Side Comparison
| Thuộc Tính | Archbold's Nightjar | Rufous-bellied Nighthawk |
|---|---|---|
| Tên Khoa Học | Eurostopodus archboldi | Lurocalis rufiventris |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Caprimulgidae | Caprimulgidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 41,0 cm (16.1 in) | 40,6 cm (16.0 in) |
| Khối Lượng | 77,0 g (2.72 oz) | 104,5 g (3.69 oz) |
| Chế Độ Ăn | Aerial insectivore; catches moths and beetles in nocturnal flight over New Guinea montane forest. | Catches large flying insects in nocturnal aerial pursuit over Andean forest and forest edge. |
| Số Trứng | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Archbold's Nightjar
Rarely recorded; presumed churring nocturnal song; low, resonant trilling typical of genus; vocalizations scarcely documented from highland New Guinea
Rufous-bellied Nighthawk
Deep, hollow 'wok-wok' series; resonant frog-like calls from Andean forest canopy; lower in pitch than Short-tailed Nighthawk; carries across mountain valleys
Geographic Range & Migration
Archbold's Nightjar
Resident of montane forest in central New Guinea (Snow Mountains and Star Mountains) above 1,500 m; very poorly known.
Rufous-bellied Nighthawk
Resident of Andean foothills and montane forest edge from Colombia and Venezuela south through Ecuador and Peru to Bolivia, at 500–2,000 m.
Tình Trạng Bảo Tồn
Archbold's Nightjar
Rufous-bellied Nighthawk
How to Tell Them Apart
Archbold's Nightjar
Brown and dark grey with rufous-buff vermiculations; whitish throat patch; pale buff supercilium contrasts with darker crown; no white wing or tail patches; tail barred; New Guinea highlands; few records.
Rufous-bellied Nighthawk
Dark sooty-brown above with buff and chestnut spotting; distinctive rufous-orange belly contrasting with dark breast; no white wing bar; short rounded tail; rufous tone on underparts unique among nighthawks.
About These Birds
Archbold's Nightjar
A small Caprimulgidae nightjar (~77 g) known from subalpine grasslands and forest margins in the interior mountains of New Guinea. Named after naturalist Richard Archbold. Cryptic brown-patterned plumage. Nocturnal insectivore. Infrequently observed; biology largely undescribed. Least Concern in its montane range.
Rufous-bellied Nighthawk
A medium Caprimulgidae nighthawk (~105 g) of montane forest edges and humid foothill zones from Colombia to Bolivia. Rufous underparts contrast with dark upperparts; a white throat patch is visible. Hawk-like flight above the forest at dusk and dawn. Seldom recorded; biology little known. Least Concern.