Vogelkop Owlet-nightjar Bird Details

Aegotheles affinis
Vogelkop Owlet-nightjar
NA
Adelardo Tommaso Salvadori, 1876
Caprimulgiformes (NIGHTJARS AND ALLIES)
Aegothelidae
Aegotheles

Indonesia (Vogelkop Peninsula) and Papua New Guinea.

Appearance :
It has a cryptic plumage with variegated patterns, suitable for camouflage in its forest habitat. Typically, owlet-nightjars are small, nocturnal birds with large heads and eyes adapted for night vision.
Behaviour :
Nocturnal and crepuscular; they are active at dawn and dusk, foraging for insects.
Habitat :
Found in tropical forests and woodland habitats, often in areas with dense vegetation and suitable roosting spots.
Diet :
Primarily insectivorous, feeding on moths, beetles, and other nocturnal insects.
Conservation Status :
Data Deficient
Distribution :
ndemic to New Guinea (including the Vogelkop Peninsula in Indonesia), where it inhabits various forested regions.
Population Size :
Data Deficient status.
Life Span :
Approximately 10 to 11 years.
Body And Tarsus:
  • Small and compact, typical of owlet-nightjars, with a streamlined shape suited for nocturnal flight.
  • Tarsus Length: Approximately 1.5-2 cm
Head And Bill :
  • Head: The head is relatively large compared to body size.
  • Bill: A short, stout bill adapted for catching insects.
  • Bill Length: Typically, around 1-2 cm.
Length :
Generally around 20-25 cm from head to tail.
Neck :
Short and not prominently visible due to the bird's compact body.
Size :
Small to medium-sized among nightjars.
Tail Details :
  • Tail:  The tail is short and rounded.
  • Tail Length: About 7-10 cm.
Weight :
Typically lightweight, likely less than 100 grams.
Wing :
Broad and rounded wings, ideal for maneuvering in forested habitats during nocturnal flights.
Wing Span :
Approximately 40-50 cm.
Facial Feature :
Has a large head with large, dark eyes adapted for low-light vision, characteristic of nocturnal birds.
Nest Details :
  • Nest: Constructed in tree hollows, often choosing natural cavities or abandoned nests of other birds.
  • Nest Made Up Of: Lined with soft materials such as leaves, moss, and feathers to provide insulation and comfort for eggs and chicks during incubation and early development.
    • Breeding Season :
    Generally occur during favorable seasons for insect abundance.
    Nesting Season :
    Typically nests during the wet season when food resources are more abundant.
    Egg Color :
    White or creamy with light brown or grayish speckles.
    Egg Length :
    Approximately 2-2.5 cm.
    Egg Width and Weight :
  • Egg Width: Around 1.5-2 cm.
  • Egg Weight: Each egg weighs approximately 4-6 grams.
    • Clutch Size :
    Usually lays 1-2 eggs per clutch.
    No. of Broods :
    Usually raises a single brood per breeding season.
    Incubation Period :
    Incubation lasts about 20-24 days.
    Nestling Period :
    Typically lasts several weeks.
    Vocalization :
    The Vogelkop Owlet-nightjar produces soft, melodious calls resembling whistles or trills, often heard during dusk and dawn.
    Sex Demorphism :
    Males may have slightly larger bills or more prominent facial features, but this can vary.
    Migration Details :

    Typically non-migratory; they are believed to be resident within their habitat range.

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