Vogelkop Owlet-nightjar vs Mountain Owlet-nightjar
Aegotheles affinis compared with Aegotheles albertisi
Side-by-Side Comparison
| Attribute | Vogelkop Owlet-nightjar | Mountain Owlet-nightjar |
|---|---|---|
| Scientific Name | Aegotheles affinis | Aegotheles albertisi |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Aegothelidae | Aegothelidae |
| Conservation Status | Near Threatened | Least Concern |
| Length | — | — |
| Wingspan | 26.7 cm (10.5 in) | 22.8 cm (9.0 in) |
| Weight | 52.3 g (1.84 oz) | 37.6 g (1.33 oz) |
| Diet | Nocturnal insectivore feeding on beetles, moths, and ants; hunts with short aerial sallies and ground-gleaning. | Nocturnal beetle and moth specialist; forages by short aerial pursuits and occasionally picks invertebrates from … |
| Clutch Size | -- | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Vogelkop Owlet-nightjar
Soft churring trill; quiet 'trrr' from Vogelkop Peninsula forest; calls at night; poorly documented; similar to Barred Owlet-nightjar but softer; alarm a chattered series
Mountain Owlet-nightjar
High-pitched churring trill; rapid 'cheerr-cheerr' from New Guinea mountains; calls at night from montane forest; alarm a sharp rapid chatter; higher than lowland species
Geographic Range & Migration
Vogelkop Owlet-nightjar
Endemic to the Vogelkop Peninsula of western New Guinea. Found in lowland and hill forest. Range and habits poorly understood from few specimens.
Mountain Owlet-nightjar
Found in the mountains of New Guinea at 1,200–3,700 m. Resident in montane rainforest and moss forest. Widespread in New Guinea highlands.
Conservation Status
Vogelkop Owlet-nightjar
Mountain Owlet-nightjar
How to Tell Them Apart
Vogelkop Owlet-nightjar
Dark grey-brown upperparts with darker barring; underparts pale buff barred dark brown; facial disc with dark border; restricted to Vogelkop Peninsula, New Guinea; slightly darker and greyer than allied Mountain …
Mountain Owlet-nightjar
Rufous-brown upperparts with dark blackish barring; underparts pale buff barred dark brown; facial disc with dark border lines; New Guinea montane species with warm rufous tones distinguishing it from lowland …
About These Birds
Vogelkop Owlet-nightjar
A medium-sized owlet-nightjar (22-24 cm) found in montane forests of the Vogelkop Peninsula (Bird's Head) of western New Guinea. Dark brown barred plumage. Nocturnal insectivore. Recently recognized as a distinct species, separated from Barred Owlet-nightjar. Limited ecological data.
Mountain Owlet-nightjar
A medium-sized owlet-nightjar (21-24 cm) found in montane forests of New Guinea at 1,200-3,700 m elevation. Variable plumage with rufous and grey morphs. Nocturnal insectivore, feeding on beetles and moths near the ground. One of the more commonly encountered New Guinea owlet-nightjars.