Spotted Nightjar vs Spot-tailed Nightjar
Eurostopodus argus เปรียบเทียบกับ Hydropsalis maculicaudus
Side-by-Side Comparison
| คุณสมบัติ | Spotted Nightjar | Spot-tailed Nightjar |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Eurostopodus argus | Hydropsalis maculicaudus |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Caprimulgidae | Caprimulgidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 42.7 cm (16.8 in) | 25.8 cm (10.2 in) |
| น้ำหนัก | 102.5 g (3.62 oz) | 32.125 g (1.13 oz) |
| อาหาร | Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … | Catches flying insects in nocturnal aerial pursuit over Central and South American grassland. |
| จำนวนไข่ | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Spotted Nightjar only
Spot-tailed Nightjar only
ไม่มี
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
Spot-tailed Nightjar
Soft, rhythmic churring; gentle 'trrr-trrr' from humid grassland; calls low from ground; quieter than most nightjars; alarm a subtle 'chek'; small and inconspicuous
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.
Spot-tailed Nightjar
Resident of open cerrado, scrub, and forest edge in interior South America from Venezuela and the Guianas south to Bolivia, Brazil, and Paraguay.
สถานะการอนุรักษ์
Spotted Nightjar
Spot-tailed Nightjar
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 …
Spot-tailed Nightjar
Small; brown and buff mottled above; pale buff below with dark barring; white throat in male; distinctive white spots on rounded tail distinguishing it from similar Hydropsalis; buff throat in …
About These Birds
Spotted Nightjar
A medium Caprimulgidae nightjar (~103 g) of open woodland, spinifex grassland, and rocky ridges across mainland Australia. Intricately spotted and barred brown, grey, and buff. Cryptic by day on the ground among leaf litter. Crepuscular and nocturnal; feeds on flying insects caught in aerial pursuit. Least Concern.
Spot-tailed Nightjar
A very small Caprimulgidae nightjar (~32 g) of open cerrado, llanos, and grass savanna in Central America and tropical South America. Named for white spots on the outer tail. Extremely secretive; roosts on the ground. Feeds on tiny insects at dusk and dawn. Less vocal than related species; Least Concern.