Sombre Nightjar vs Lesser Nighthawk
Caprimulgus fraenatus 比較対象 Chordeiles acutipennis
Side-by-Side Comparison
| 属性 | Sombre Nightjar | Lesser Nighthawk |
|---|---|---|
| 学名 | Caprimulgus fraenatus | Chordeiles acutipennis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 32.4 cm (12.8 in) | 33.0 cm (13.0 in) |
| 体重 | 60.0 g (2.12 oz) | 50.0 g (1.76 oz) |
| 食性 | Feeds at night on flying insects including moths and beetles; hunts with buoyant erratic flight … | Hawks small flying insects at dusk and dawn over North and South American arid scrub … |
| 一腹卵数 | 1-2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Sombre Nightjar
Monotonous churring trill; repetitive 'churr' at moderate tempo from East African scrub; lower-pitched and less musical than some relatives; calls persistently at night
Lesser Nighthawk
Loud purring trill; buzzy 'brrrrr' given in flight; lower and softer than Common Nighthawk; males display with booming wingbeats; calls at dusk over deserts
Geographic Range & Migration
Sombre Nightjar
Found across East Africa from Ethiopia and Somalia south to Tanzania. Resident in dry acacia scrub, thornbush, and arid savanna at low elevations.
Lesser Nighthawk
Breeds in open arid scrub from southwestern USA south through Central America to western South America; winters in Mexico and northern South America.
保全状況
Sombre Nightjar
Lesser Nighthawk
How to Tell Them Apart
Sombre Nightjar
Uniformly dark sooty-brown upperparts with dense blackish vermiculations; pale buff supercilium and narrow white submoustachial stripe; underparts barred buff and dark brown. Sexes similar.
Lesser Nighthawk
Brown and buff mottled above; buff-white below with brown barring; white throat in male; white wing bar closer to wingtip than in Common Nighthawk; buff tail band. Female with buff …
About These Birds
Sombre Nightjar
体長23〜25cmのエチオピアから南アフリカのサハラ以南に生息するヨタカ。開けた林地・サバンナに生息する。
Lesser Nighthawk
ヒメナイトホーク(Chordeiles acutipennis)は北アメリカ南西部からブラジルにかけて広く分布するナイトホークです。体長約20cmで、細長い翼と独特の飛行パターンが特徴です。薄明時に昆虫を捕食し、砂地や岩石地の地面に営巣します。