Heinrich's Nightjar vs Solomons Nightjar
Eurostopodus diabolicus compared with Eurostopodus nigripennis
Side-by-Side Comparison
| Attribute | Heinrich's Nightjar | Solomons Nightjar |
|---|---|---|
| Scientific Name | Eurostopodus diabolicus | Eurostopodus nigripennis |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Caprimulgidae | Caprimulgidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | — | — |
| Wingspan | 39.9 cm (15.7 in) | 43.2 cm (17.0 in) |
| Weight | 104.0 g (3.67 oz) | 137.5 g (4.85 oz) |
| Diet | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. | Aerial insectivore; hawks moths and other large insects at night over Solomon Islands forest and … |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Solomons Nightjar
Deep, resonant churring call at dusk; slow repetitive notes with hollow, frog-like quality; poorly known vocalizations; rarely recorded in wild
Geographic Range & Migration
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
Solomons Nightjar
Endemic to the Solomon Islands; resident of lowland forest, secondary growth, and forest edge on Guadalcanal and adjacent islands.
Conservation Status
Heinrich's Nightjar
Solomons Nightjar
How to Tell Them Apart
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.
Solomons Nightjar
Dark brown and blackish with buff mottling; rufous-buff supercilium; white throat patch; darker overall than most Eurostopodus nightjars; restricted to Solomon Islands; no white wing or tail patches.
About These Birds
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.
Solomons Nightjar
A medium-large Caprimulgidae nightjar (~138 g) endemic to Bougainville and the central Solomon Islands. Dark brown and buff cryptic plumage; relatively large for the genus. Inhabits closed-canopy forest and forest edges. Feeds on insects at night. Vulnerable owing to its very restricted island range and ongoing deforestation.