Puerto Rican Nightjar vs Lesser Nighthawk
Antrostomus noctitherus 比較対象 Chordeiles acutipennis
Side-by-Side Comparison
| 属性 | Puerto Rican Nightjar | Lesser Nighthawk |
|---|---|---|
| 学名 | Antrostomus noctitherus | Chordeiles acutipennis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 26.5 cm (10.4 in) | 33.0 cm (13.0 in) |
| 体重 | 35.99 g (1.27 oz) | 50.0 g (1.76 oz) |
| 食性 | Catches large flying insects, especially moths, at night over Puerto Rican dry limestone forest; endangered. | 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
Puerto Rican Nightjar
Sharp 'took' or 'took-WHEEER'; distinctive two-note call; calls from dry coastal forest of Puerto Rico; endangered; calls less frequently than mainland relatives
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
Puerto Rican Nightjar
Endemic to Puerto Rico; critically endangered resident of karst limestone scrub and dry forest in the southwestern part of the island.
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
Puerto Rican Nightjar
Lesser Nighthawk
How to Tell Them Apart
Puerto Rican Nightjar
Small; grey-brown and buff mottled above with dark vermiculations; white gorget in male; pale buff barred underparts; white outer tail spots in male; buff tail in female; critically small range …
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
Puerto Rican Nightjar
A small Caprimulgidae nightjar (~36 g) endemic to the dry limestone coastal scrub of southwestern Puerto Rico. Cryptically patterned grey-brown. Restricted to a tiny area of suitable habitat; population estimated at a few hundred pairs. Feeds on insects at night. Vulnerable from habitat conversion and introduced predators.
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。