Lesser Nighthawk vs Ladder-tailed Nightjar
Chordeiles acutipennis 比較対象 Hydropsalis climacocerca
Side-by-Side Comparison
| 属性 | Lesser Nighthawk | Ladder-tailed Nightjar |
|---|---|---|
| 学名 | Chordeiles acutipennis | Hydropsalis climacocerca |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 33.0 cm (13.0 in) | 29.9 cm (11.8 in) |
| 体重 | 50.0 g (1.76 oz) | 48.0 g (1.69 oz) |
| 食性 | Hawks small flying insects at dusk and dawn over North and South American arid scrub … | Nocturnal aerial insectivore; hawks insects over Amazonian river margins and forest clearings. |
| 一腹卵数 | 1-2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
Ladder-tailed Nightjar
Resonant churring trill over Amazonian rivers; 'churr-churr' with hollow quality; calls from riverside sandbars and beaches at dusk; distinctive riverside habitat singer
Geographic Range & Migration
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.
Ladder-tailed Nightjar
Resident of sandy riverbanks, open woodland, and savanna in the Amazon basin from Colombia and Peru south to Bolivia and central Brazil.
保全状況
Lesser Nighthawk
Ladder-tailed Nightjar
How to Tell Them Apart
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 …
Ladder-tailed Nightjar
Male brown and buff mottled above; white throat; graduated tail with white ladder pattern on inner webs of outer rectrices diagnostic; white wing patches. Female has buff throat; tail barred …
About These Birds
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。
Ladder-tailed Nightjar
A small Caprimulgidae nightjar (~48 g) of rivers, oxbow lakes, and riverine forest edges throughout the Amazon Basin. Males possess white-banded, step-like outer tail feathers giving a ladder appearance. Roosts on branches and sandy banks near water. Feeds on insects at night. Least Concern.