Vogelkop Owlet-nightjar vs Wallace's Owlet-nightjar
Aegotheles affinis в сравнении с Aegotheles wallacii
Side-by-Side Comparison
| Характеристика | Vogelkop Owlet-nightjar | Wallace's Owlet-nightjar |
|---|---|---|
| Научное название | Aegotheles affinis | Aegotheles wallacii |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Aegothelidae | Aegothelidae |
| Охранный статус | Near Threatened | Least Concern |
| Длина | — | — |
| Размах крыльев | 26,7 cm (10.5 in) | 23,8 cm (9.4 in) |
| Масса | 52,3 g (1.84 oz) | 49,9 g (1.76 oz) |
| Питание | Nocturnal insectivore feeding on beetles, moths, and ants; hunts with short aerial sallies and ground-gleaning. | Crepuscular insectivore feeding on large beetles and moths; hunts with combined aerial sallies and surface … |
| Размер кладки | -- | -- |
| 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
Wallace's Owlet-nightjar
Soft churring trill; 'churr' from New Guinea lowland forest; moderate pitch; calls at night from hollow tree roost sites; alarm a rapid staccato chatter
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.
Wallace's Owlet-nightjar
Found in New Guinea and the Aru Islands in lowland and hill forest up to 1,200 m. Resident in primary and secondary tropical forest.
Охранный статус
Vogelkop Owlet-nightjar
Wallace's 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 …
Wallace's Owlet-nightjar
Grey-brown upperparts with dark brown barring and pale buff freckling; underparts pale buff barred brown; facial disc with dark border; Papuan species showing typical owlet-nightjar coloration with moderately contrasting barring.
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.
Wallace's Owlet-nightjar
A medium-sized owlet-nightjar (23-25 cm) found in lowland forests of New Guinea and the Aru Islands. Dark brown plumage with barred underparts. Nocturnal insectivore of dense forest undergrowth. Named after Alfred Russel Wallace. Poorly studied in the wild.