Nechisar Nightjar vs Spotted Nightjar
Caprimulgus solala 比較対象 Eurostopodus argus
Side-by-Side Comparison
| 属性 | Nechisar Nightjar | Spotted Nightjar |
|---|---|---|
| 学名 | Caprimulgus solala | Eurostopodus argus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 37.0 cm (14.6 in) | 42.7 cm (16.8 in) |
| 体重 | 79.0 g (2.79 oz) | 102.5 g (3.62 oz) |
| 食性 | Nocturnal aerial insectivore; hawks moths and flying beetles over arid scrubland and rocky desert margins. | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … |
| 一腹卵数 | -- | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Nechisar Nightjar
Virtually unknown vocalizations; known only from a single wing feather; presumed churring song; critically rare Ethiopian endemic with essentially undescribed call
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
Nechisar Nightjar
Found across the Sahel from Senegal east to Ethiopia and south to Uganda and Kenya. Resident in open savanna and dry grassland.
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
Nechisar Nightjar
Spotted Nightjar
How to Tell Them Apart
Nechisar Nightjar
Known from a single wing feather specimen; dark brownish-black with pale buff and tawny mottling; intricate fine vermiculations consistent with Caprimulgus pattern; extremely poorly known Ethiopian endemic.
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
Nechisar Nightjar
1990年にエチオピアのネキサル平野で採集された1標本と羽根のみが知られる絶滅危惧IA類のヨタカ。生態は不明。
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。