Bonaparte's Nightjar vs Spotted Nightjar
Caprimulgus concretus so với Eurostopodus argus
Side-by-Side Comparison
| Thuộc Tính | Bonaparte's Nightjar | Spotted Nightjar |
|---|---|---|
| Tên Khoa Học | Caprimulgus concretus | Eurostopodus argus |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Caprimulgidae | Caprimulgidae |
| Tình Trạng Bảo Tồn | Vulnerable | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 32,8 cm (12.9 in) | 42,7 cm (16.8 in) |
| Khối Lượng | 57,5 g (2.03 oz) | 102,5 g (3.62 oz) |
| Chế Độ Ăn | 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 … |
| Số Trứng | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Bonaparte's Nightjar only
Không
Spotted Nightjar only
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.
Tình Trạng Bảo Tồn
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
A small, secretive nightjar (20-22 cm) of lowland and peat-swamp forests in Borneo and Sumatra. Dark brown plumage with fine barring. Nocturnal insectivore, poorly known due to dense forest habitat. Classified as Near Threatened due to ongoing deforestation.
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.