Bonaparte's Nightjar vs Spotted Nightjar
Caprimulgus concretus 比較対象 Eurostopodus argus
Side-by-Side Comparison
| 属性 | Bonaparte's Nightjar | Spotted Nightjar |
|---|---|---|
| 学名 | Caprimulgus concretus | Eurostopodus argus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 32.8 cm (12.9 in) | 42.7 cm (16.8 in) |
| 体重 | 57.5 g (2.03 oz) | 102.5 g (3.62 oz) |
| 食性 | Crepuscular and nocturnal insectivore; catches moths, beetles, and large flying insects on the wing in … | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … |
| 一腹卵数 | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Bonaparte's Nightjar
Churring call from Borneo lowland forest; repetitive hollow trill; rarely recorded; calls at night from dense humid forest; alarm a sharp bark note
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
Bonaparte's Nightjar
Found in highland Borneo and Sumatra in montane forest at 1,000–2,500 m. Endemic to the Sundaic region; infrequently recorded.
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
Bonaparte's Nightjar
Spotted Nightjar
How to Tell Them Apart
Bonaparte's Nightjar
Rich dark brown upperparts with black-centred feathers and buff-chestnut edging; white throat patch; densely barred underparts; males have white outer tail feathers; Bornean endemic with notably deep brown tones.
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
Bonaparte's Nightjar
体長20〜22cmのボルネオ・スマトラの泥炭湿地林に生息するヨタカ。森林破壊により準絶滅危惧種。
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。