Dusky Nightjar vs Andaman Nightjar
Antrostomus saturatus so với Caprimulgus andamanicus
Side-by-Side Comparison
| Thuộc Tính | Dusky Nightjar | Andaman Nightjar |
|---|---|---|
| Tên Khoa Học | Antrostomus saturatus | Caprimulgus andamanicus |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Caprimulgidae | Caprimulgidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 28,9 cm (11.4 in) | 36,4 cm (14.3 in) |
| Khối Lượng | 51,95 g (1.83 oz) | 66,06666666666666 g (2.33 oz) |
| Chế Độ Ăn | Nocturnal aerial insectivore; hawks moths and beetles over Costa Rican and Panamanian forest. | Night-hunting insectivore targeting moths, flying beetles, and winged ants in erratic low-altitude aerial passes. |
| Số Trứng | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Dusky Nightjar
Soft, repeated 'wherrr-wherrr'; gentle churring whistle from Costa Rican highlands; calls from cloud forest at night; moderate pace with slight upward inflection
Andaman Nightjar
Loud 'chuck-chuck-trrr'; hollow knocking prefix followed by trill; endemic to Andaman Islands; calls at night from forest edges and clearings; similar to Large-tailed
Geographic Range & Migration
Dusky Nightjar
Resident of highland forest and forest edge in Costa Rica and western Panama, at 1,000–2,500 m; closely tied to Chirripó massif.
Andaman Nightjar
Endemic to the Philippines including Luzon and Mindanao. Resident in lowland and submontane forest and forest edge up to 1,800 m.
Tình Trạng Bảo Tồn
Dusky Nightjar
Andaman Nightjar
How to Tell Them Apart
Dusky Nightjar
Darker and more saturated than related nightjars; dark brown-grey with buff mottling and dark vermiculations; white gorget in male; pale buff barred underparts; small white outer tail spots; Costa Rican …
Andaman Nightjar
Warm rufous-brown upperparts with black-centred scapulars and pale buff streaks; broad white throat patch; males show white outer tail feathers; underparts buff barred brown; endemic island coloration slightly warmer than …
About These Birds
Dusky Nightjar
A medium-small Caprimulgidae nightjar (~52 g) of montane forest and forest edges in Costa Rica and western Panama above 900 m. Dark sooty-brown plumage with faint paler barring. Calls with a repeated churring phrase at night. Feeds on flying insects in montane cloud forest. Least Concern; range restricted but stable.
Andaman Nightjar
A medium-sized nightjar (24-26 cm) endemic to the Andaman Islands in the Bay of Bengal. Dark brown plumage with rufous collar spots. Nocturnal insectivore of lowland and mangrove forests. A sedentary species with a restricted island range.