Mountain Owlet-nightjar Bird Details
Aegotheles albertisi
Mountain Owlet-nightjar
NA
Philip Lutley Sclater, 1874
Caprimulgiformes (NIGHTJARS AND ALLIES)
Aegothelidae
Aegotheles
Appearance :
Small nocturnal bird with a length of about 21–23 cm. Brownish-grey plumage with fine streaks and spots. Large eyes adapted for night vision. Short, rounded wings and a long tail.
Behaviour :
Nocturnal and elusive. Roosts during the day in dense vegetation or tree cavities. Active at night, when it hunts for food. Produces soft, repetitive calls.
Habitat :
Prefers montane forests, particularly in the highlands. Found at elevations ranging from 1,000 to 3,000 meters.
Diet :
Insectivorous, feeding primarily on moths, beetles, and other small insects.
Conservation Status :
Least Concern
Distribution :
Endemic to New Guinea, including both Papua New Guinea and the Indonesian province of Papua.
Population Size :
Exact population size is unknown.
Life Span :
Typically live for several years.
Body And Tarsus:
- Small, compact body adapted for nocturnal life.
- Tarsus Length: Approximately 16–18 mm.
Head And Bill :
- Head: Large head relative to body size, with large, forward-facing eyes.
- Bill: Short, broad bill with bristles at the base, aiding in insect capture.
- Bill Length: About 12–14 mm.
Length :
Total length ranges from 21–23 cm.
Neck :
Short and sturdy, providing support for its large head.
Size :
Small-sized nocturnal bird.
Tail Details :
- Tail: Long tail, often used for balance during agile flight through dense forests.
- Tail Length: Approximately 10–12 cm.
Weight :
Ranges between 45–60 grams.
Wing :
Short, rounded wings adapted for maneuverable flight in forested habitats.
Wing Span :
Approximately 30–34 cm.
Facial Feature :
Large, forward-facing eyes adapted for excellent night vision. Short, broad bill with bristles at the base for catching insects.
Nest Details :
- Nest: Typically nests in tree cavities or other sheltered locations.
- Nest Made Up Of: Soft materials like leaves and moss.
Breeding Season :
Breeding likely coincides with periods of food abundance.
Nesting Season :
Generally corresponds with the wet season when insect prey is more abundant.
Egg Color :
White or cream-colored with light speckling.
Egg Length :
Approximately 24-26 mm.
Egg Width and Weight :
- Egg Width: Approximately 19-21 mm.
- Egg Weight: Each egg weighs around 4-5 grams.
Clutch Size :
Typically lays 1-2 eggs per clutch.
No. of Broods :
Raises a single brood per breeding season.
Incubation Period :
Lasts for about 21-23 days, primarily undertaken by the female.
Nestling Period :
Nest for about 24-28 days before fledging.
Vocalization :
Produces soft, repetitive calls during the night, described as melodious but not well documented.
Sex Demorphism :
Males and females appearing similar in plumage and size.
Migration Details :
Non-migratory, generally remains within its montane forest habitat year-round.
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