Silky-tailed Nightjar vs Spotted Nightjar
Antrostomus sericocaudatus 비교 대상 Eurostopodus argus
Side-by-Side Comparison
| 속성 | Silky-tailed Nightjar | Spotted Nightjar |
|---|---|---|
| 학명 | Antrostomus sericocaudatus | Eurostopodus argus |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Caprimulgidae | Caprimulgidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 32.1 cm (12.6 in) | 42.7 cm (16.8 in) |
| 체중 | 77.5 g (2.73 oz) | 102.5 g (3.62 oz) |
| 식성 | Hawks moths and beetles in nocturnal aerial sallies over South American lowland and foothill forest. | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … |
| 산란 수 | 2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Silky-tailed Nightjar
Whistled, rolling 'pwee-pwee-pwee'; melodic phrase from Amazonian forest; calls persistently at dusk; slightly slurred delivery; alarm a sudden sharp 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
Silky-tailed Nightjar
Resident of lowland and foothill forest in southern Brazil (São Paulo, Minas Gerais, Santa Catarina) and adjacent Paraguay and Argentina.
Spotted Nightjar
Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.
보전 상태
Silky-tailed Nightjar
Spotted Nightjar
How to Tell Them Apart
Silky-tailed Nightjar
Brown and buff mottled above with dark vermiculations; white gorget in male; outer tail feathers with silky-white inner webs giving smooth appearance; pale buff below; female with buff gorget and …
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
Silky-tailed Nightjar
비단 꼬리 나이트자는 남아메리카 중부와 동부의 아마존 및 세라도 지역에 서식합니다. 비단처럼 부드러운 꼬리 깃털이 특징이며, 삼림 가장자리와 개활 삼림에 서식합니다.
Spotted Nightjar
호주 개방 삼림, 스피니펙스 초원, 반건조 덤불에 서식하는 중형 쏙독새(~103g). 눈점박이야행소쏙독새라고도 불린다. 관심필요종.