Common Nighthawk vs Spotted Nightjar
Chordeiles minor 比較対象 Eurostopodus argus
Side-by-Side Comparison
| 属性 | Common Nighthawk | Spotted Nightjar |
|---|---|---|
| 学名 | Chordeiles minor | Eurostopodus argus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 38.6 cm (15.2 in) | 42.7 cm (16.8 in) |
| 体重 | 71.75 g (2.53 oz) | 102.5 g (3.62 oz) |
| 食性 | Aerial insectivore; catches flying beetles, ants, moths, and flies in fast aerial pursuit over open … | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … |
| 一腹卵数 | 1-2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Common Nighthawk
Loud, nasal 'peent' call repeated in flight; display dive produces loud booming 'whomp' with wings; churring trill on breeding grounds; colonial roost cacophony
Spotted Nightjar
Loud churring 'good-lord-deliver-us' repeated at dusk; melodic bubbling quality; also emits hollow 'cow-cow-cow' series and soft frog-like croaking
Geographic Range & Migration
Common Nighthawk
Breeds across North America from Alaska to the Gulf Coast; long-distance migrant wintering in South America south to Argentina.
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
保全状況
Common Nighthawk
Spotted Nightjar
How to Tell Them Apart
Common Nighthawk
Brown and grey mottled above; white throat in male; white and dark barred underparts; distinctive white wing bar across primaries positioned more centrally than in Lesser Nighthawk; white tail band …
Spotted Nightjar
Cryptically mottled grey-brown, rufous, and black with intricate vermiculations; distinctive large white spots on wing coverts; white throat patch; no white in wings or tail. Sexes similar with slight pattern …
About These Birds
Common Nighthawk
コモンナイトホーク(Chordeiles minor)は北アメリカに広く分布するナイトホークです。夏はカナダや米国で繁殖し、冬は南アメリカに渡ります。体長約24cmで、「ピーント」という独特の鳴き声を持ちます。薄明時の飛行中に昆虫を捕食します。
Spotted Nightjar
オーストラリア本土のスピニフェックス草原に生息するヨタカで、体重103g。