Wallace's scops owl
Wallace's scops owl, also known as the Lesser Sunda scops owl, is a nocturnal bird endemic to the Sumbawa and Flores islands in Indonesia. It is characterized by its brown plumage, prominent ear tufts, bright yellow eyes, and a distinctive vocalization that resembles the swishing of a sword.
Key Facts
- ›Endemic to the Indonesian islands of Sumbawa and Flores.
- ›Primarily insectivorous, though its diet requires further study.
- ›Possesses long ear tufts and bright yellow eyes.
- ›Its call is described as a territorial sound resembling a swishing sword.
- ›Classified as 'Least Concern' by the IUCN with a stable population trend.
- ›Adults measure between 23 to 27 cm in length and weigh approximately 210g.
Lesser Sunda Scops Owl
Forested Areas, Agricultural Lands, Backyards of Houses, Bamboo Thickets
Indonesia
Insects
Not Specified
About Wallace's scops owl
Wallace's scops owl, scientifically known as Otus silvicola and also referred to as the Lesser Sunda scops owl, is a species of owl endemic to the Indonesian islands of Sumbawa and Flores. Named in honor of the British naturalist Alfred Russel Wallace, this strictly nocturnal bird is a resident of diverse habitats, including forests, agricultural lands, and even backyards. It is not considered rare within its range and has a stable population trend.
Description and Identification
The adult Wallace's scops owl measures between 23 to 27 cm in length, with a wingspan ranging from 202 to 251 cm, and weighs approximately 210 grams. Its appearance is characterized by a mostly brown plumage, long ear tufts that give it a distinctive silhouette, and striking bright yellow eyes. The facial disc is owl-shaped, and the underparts are streaked, featuring pale breast and flanks with well-defined dark shaft streaks. Its upper parts are a paler gray-brown. Juvenile birds are generally lighter in color and possess more fluffy plumage.
Habitat and Distribution
This species is exclusively found on the islands of Flores and Sumbawa in Indonesia, within the Lesser Sundas archipelago. It has adapted to a variety of environments, from dense forested areas and secondary growth to agricultural plantations and bamboo thickets. Wallace's scops owls are often observed perched at the tops of tall trees or in concealed locations, making them somewhat difficult to spot. They are typically found at elevations between 350 and 1,600 meters.
Behavior and Vocalization
Wallace's scops owl is a nocturnal hunter, spending its nights foraging for food. It is presumed to be a sedentary species on its native islands. Its vocalizations are a key identifying feature. The most recognized call is a territorial sound that resembles the swishing of a sword, often delivered as a series of 'hwomph' notes. Other vocalizations include gruff 'rrow' notes and a whistle call with variable overtones.
Diet and Reproduction
While detailed dietary studies are limited, Wallace's scops owl is thought to be primarily insectivorous. Information regarding its reproductive behavior is scarce, though observations have noted enlarged testes in males during December, suggesting a potential breeding period around this time. Further research is needed to fully understand its breeding patterns and diet.
Conservation Status
The International Union for Conservation of Nature (IUCN) has classified Wallace's scops owl as 'Least Concern' as of its latest assessment in 2016. This designation is supported by a stable population trend, indicating that the species is not currently facing significant threats to its survival.
Source: Wikipedia ↗
Frequently Asked Questions
Where is Wallace's scops owl found?
Wallace's scops owl is endemic to the Sumbawa and Flores islands, located in the Lesser Sundas chain of Indonesia. It inhabits a range of environments on these islands, including forests, agricultural lands, and bamboo thickets.
What does Wallace's scops owl look like?
This owl has a distinctive appearance with mostly brown plumage, long ear tufts, and bright yellow eyes. Adults typically measure 23 to 27 cm in length and weigh around 210 grams. Juvenile birds are generally paler and have fluffier plumage.
What sounds does Wallace's scops owl make?
Wallace's scops owl has a unique vocalization described as a territorial sound that resembles the swishing of a sword. Other reported calls include a series of gruff 'rrow' notes and a whistle call with varying overtones.
What is the conservation status of Wallace's scops owl?
According to the IUCN, Wallace's scops owl is listed as 'Least Concern'. Its population trend is considered stable based on the latest assessment in 2016.
What does Wallace's scops owl eat?
This owl species is believed to be mainly insectivorous. However, further research is needed to precisely determine its complete diet.
When is Wallace's scops owl most active?
Wallace's scops owl is strictly nocturnal, meaning it is primarily active during the night. It is presumed to be sedentary on the islands where it resides.
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