Lesser Nighthawk vs Least Poorwill
Chordeiles acutipennis 对比 Siphonorhis brewsteri
Side-by-Side Comparison
| 属性 | Lesser Nighthawk | Least Poorwill |
|---|---|---|
| 学名 | Chordeiles acutipennis | Siphonorhis brewsteri |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保护状况 | Least Concern | Near Threatened |
| 体长 | — | — |
| 翼展 | 33.0 cm (13.0 in) | 22.7 cm (8.9 in) |
| 体重 | 50.0 g (1.76 oz) | 44.0 g (1.55 oz) |
| 食性 | Hawks small flying insects at dusk and dawn over North and South American arid scrub … | Nocturnal aerial insectivore; catches small flying insects near ground over Hispaniolan dry scrub. |
| 产卵数 | 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
Least Poorwill
Soft, melodic 'poor-will' whistle; gentle and repetitive; calls from dry scrub at night; higher-pitched than Common Poorwill; subtle and often overlooked
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.
Least Poorwill
Endemic to Hispaniola (Haiti and Dominican Republic); resident of open dry forest and scrub; rare and sparsely distributed.
保护状况
Lesser Nighthawk
Least Poorwill
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 …
Least Poorwill
Small; brown and buff mottled with fine dark vermiculations; pale buff throat bordered by dark lateral spots; buff and dark barred tail; no white in wings or tail; male with …
About These Birds
Lesser Nighthawk
小夜鹰(Chordeiles acutipennis)是一种体重约50克的夜鹰科鸟类，栖息于从美国西南部和墨西哥到哥斯达黎加的荒漠、半干旱灌木丛和开阔林地，冬季迁徙至南美洲。在地面营巢，体色斑驳褐色，具出色的隐蔽性，以昆虫为食。
Least Poorwill
A small Caprimulgidae poorwill (~44 g) of dry scrub and thorn woodland in Hispaniola. Brown-and-buff cryptic plumage. Little studied; biology poorly known for this island endemic. Feeds on insects at night. Near Threatened owing to ongoing habitat degradation and deforestation on Hispaniola. Rarely encountered.