Swamp Nightjar vs Heinrich's Nightjar
Caprimulgus natalensis so với Eurostopodus diabolicus
Side-by-Side Comparison
| Thuộc Tính | Swamp Nightjar | Heinrich's Nightjar |
|---|---|---|
| Tên Khoa Học | Caprimulgus natalensis | Eurostopodus diabolicus |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Caprimulgidae | Caprimulgidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 30,6 cm (12.0 in) | 39,9 cm (15.7 in) |
| Khối Lượng | 76,3 g (2.69 oz) | 104,0 g (3.67 oz) |
| Chế Độ Ăn | Night-active aerial insectivore catching moths, beetles, and grasshoppers in sustained low-altitude hunting flights. | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. |
| Số Trứng | 2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Không
Swamp Nightjar only
Heinrich's Nightjar only
Song & Call Comparison
Swamp Nightjar
Mellow churring trill; softer 'frog-like' chrrr from wetland margins; calls from papyrus and reed beds in Africa; lower and rounder than dryland nightjars
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Geographic Range & Migration
Swamp Nightjar
Known from a single wing found in Ethiopia's Nechisar National Park. Possibly extinct; range and taxonomy uncertain. Critically Endangered.
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
Tình Trạng Bảo Tồn
Swamp Nightjar
Heinrich's Nightjar
How to Tell Them Apart
Swamp Nightjar
Relatively large; dark brown upperparts with heavy blackish streaking and pale buff spotting; broad white throat patch; underparts barred buff and dark brown; often shows paler underpart ground colour than …
Heinrich's Nightjar
Rufous-brown and dark brown mottled with buff vermiculations; large pale buff throat patch; pale buff supercilium; no white wing markings; tail darkly barred brown and buff. Poorly known; Sulawesi endemic.
About These Birds
Swamp Nightjar
A medium-sized nightjar (23-24 cm) found in moist grasslands, marshes, and vleis across sub-Saharan Africa. Warm brown plumage with distinctive white throat patches. Nocturnal insectivore that roosts on the ground in tall grass. Resident, locally nomadic during dry seasons.
Heinrich's Nightjar
A medium Caprimulgidae nightjar (~104 g) endemic to the forest and forest-edge habitats of Sulawesi, Indonesia. Cryptically patterned brown-and-buff. Nocturnal insectivore; catches moths and beetles in aerial sallies. Little studied and rarely encountered in the field. Least Concern within its Sulawesi range.