Spotted Nightjar vs Eared Poorwill
Eurostopodus argus 比較対象 Nyctiphrynus mcleodii
Side-by-Side Comparison
| 属性 | Spotted Nightjar | Eared Poorwill |
|---|---|---|
| 学名 | Eurostopodus argus | Nyctiphrynus mcleodii |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Caprimulgidae | Caprimulgidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 42.7 cm (16.8 in) | 24.1 cm (9.5 in) |
| 体重 | 102.5 g (3.62 oz) | 31.775 g (1.12 oz) |
| 食性 | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Hawks small flying insects at night in Mexican pine-oak forest on Pacific slopes. |
| 一腹卵数 | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
Eared Poorwill
Melodic 'poor-will' whistle; soft and repetitive; calls from Mexican pine-oak forest at night; distinctive tonal quality slightly harsher than other poorwills
Geographic Range & Migration
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
Eared Poorwill
Resident of highland pine-oak forest and scrub in the Sierra Madre Occidental of Mexico (Sinaloa, Durango, Nayarit), at 1,000–2,500 m.
保全状況
Spotted Nightjar
Eared Poorwill
How to Tell Them Apart
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 …
Eared Poorwill
Small; brown and buff mottled with dark vermiculations; small tufted ear-like feathers above eye diagnostic; white throat in male; buff throat in female; small white outer tail spots; Mexican highland …
About These Birds
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。
Eared Poorwill
A small Caprimulgidae poorwill (~32 g) of pine-oak forest and wooded hillsides in the Sierra Madre Occidental of western Mexico. Named for subtle pale ear tufts. Cryptic brown-and-buff plumage; roosts on ground or branches. Nocturnal insectivore. Rarely seen but detected by its repeated whistled calls. Least Concern.