Rufous-cheeked Nightjar vs Lesser Nighthawk
Caprimulgus rufigena 比較対象 Chordeiles acutipennis
Side-by-Side Comparison
| 属性 | Rufous-cheeked Nightjar | Lesser Nighthawk |
|---|---|---|
| 学名 | Caprimulgus rufigena | Chordeiles acutipennis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 32.1 cm (12.6 in) | 33.0 cm (13.0 in) |
| 体重 | 54.68333333333334 g (1.93 oz) | 50.0 g (1.76 oz) |
| 食性 | Nocturnal aerial insectivore; catches moths, crickets, and beetles in sustained low-altitude hunting flights. | 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
Rufous-cheeked Nightjar
Rapid churring trill interspersed with 'chook' notes; churring 'rrr-chook-rrr-chook' pattern; calls from southern African woodland at night; distinctive interrupted rhythm
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
Rufous-cheeked Nightjar
Breeds in southern Africa from Namibia to South Africa. Partially migratory, moving north in austral winter. Found in dry woodland and savanna.
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
Rufous-cheeked Nightjar
Lesser Nighthawk
How to Tell Them Apart
Rufous-cheeked Nightjar
Cryptic brown-grey upperparts with bold black streaks; distinctive warm rufous-cinnamon cheek patch; white throat patch; males show white outer tail corners absent in females.
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
Rufous-cheeked Nightjar
体長23〜25cmの赤褐色の頬斑を持つヨタカ。東・南アフリカの乾燥したサバンナに生息し、アフリカ内で渡りを行う。
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。