Sickle-winged Nightjar vs Archbold's Nightjar
Eleothreptus anomalus 对比 Eurostopodus archboldi
Side-by-Side Comparison
| 属性 | Sickle-winged Nightjar | Archbold's Nightjar |
|---|---|---|
| 学名 | Eleothreptus anomalus | Eurostopodus archboldi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 25.8 cm (10.2 in) | 41.0 cm (16.1 in) |
| 体重 | 43.7 g (1.54 oz) | 77.0 g (2.72 oz) |
| 食性 | Aerial insectivore; hawks moths and beetles at night over South American wet grassland and marshes. | Aerial insectivore; catches moths and beetles in nocturnal flight over New Guinea montane forest. |
| 产卵数 | 2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Sickle-winged Nightjar
Soft churring call; low-pitched, repetitive trill from grassland; males produce distinctive wing noise in display flight; vocalizations quiet compared to wing sounds
Archbold's Nightjar
Rarely recorded; presumed churring nocturnal song; low, resonant trilling typical of genus; vocalizations scarcely documented from highland New Guinea
Geographic Range & Migration
Sickle-winged Nightjar
Resident of open marshland, wet grassland, and savanna from Paraguay and adjacent Bolivia south to Uruguay and northeastern Argentina.
Archbold's Nightjar
Resident of montane forest in central New Guinea (Snow Mountains and Star Mountains) above 1,500 m; very poorly known.
保护状况
Sickle-winged Nightjar
Archbold's Nightjar
How to Tell Them Apart
Sickle-winged Nightjar
Male with extraordinarily elongated sickle-shaped outer primaries; dark brown with buff mottling; white throat and wing spots. Female brown with buff spots; normal wing shape; male wing shape unique among …
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.
About These Birds
Sickle-winged Nightjar
体重约44克的小型夜鹰，栖息于南美洲东南部湿润潘帕斯草地。雄鸟具镰刀形翅膀轮廓。易危。
Archbold's Nightjar
体重约77克的小型夜鹰，栖息于新几内亚内陆的亚高山草地。以理查德·阿奇博尔德命名。