Identification and Distribution of Blue-wattled Bulbul (Microtarsus nieuwenhuisii) in Aceh

 

Blue-wattled Bulbul  https://searchforlostbirds.org/birds/1693

* Heri Tarmizi

The Blue-wattled Bulbul's data status is listed as Data Deficient (DD) according to the International Union for Conservation of Nature (IUCN), indicating the need for more comprehensive studies to understand its population, distribution, and ecological requirements.

Introduction The Blue-wattled Bulbul, scientifically known as Microtarsus nieuwenhuisii, is one of the most enigmatic bird species found in the region of Aceh, Sumatra, Indonesia. This species is notable for its scarce and sporadic sightings, making it a subject of intrigue among ornithologists and bird enthusiasts. The Blue-wattled Bulbul's data status is listed as Data Deficient (DD) according to the International Union for Conservation of Nature (IUCN), indicating the need for more comprehensive studies to understand its population, distribution, and ecological requirements.

Identification The Blue-wattled Bulbul is characterized by its distinctive blue wattles, which are fleshy growths located on the sides of its face. This feature is particularly prominent in males, serving as a key identification marker. The species exhibits a predominantly olive-green plumage, which provides camouflage in its forest habitat. Adults typically display a darker coloration on the wings and tail, with the underparts being lighter. The bird's vocalizations are often described as melodious and varied, contributing to its appeal among birdwatchers.

Distribution in Aceh In Aceh, the Blue-wattled Bulbul has only been recorded once, specifically in Lesten, Gayo Lues. This single record underscores the bird's elusive nature and possibly limited distribution within the region. The habitat preferences of Microtarsus nieuwenhuisii include dense forested areas, where it is believed to forage for insects and fruits. The lack of frequent sightings suggests that the species may inhabit remote and less accessible parts of the forest, further complicating efforts to study its ecology.

Map distribution of Blue-wattled Bulbul   https://macaulaylibrary.org/asset/726212

Source Specimen and Data The primary source of data for the Blue-wattled Bulbul in Aceh originates from a specimen collected on March 21, 1937. This specimen, identified as an adult male, is cataloged as the holotype RMNH.AVES.14044 in the collection of Naturalis, the Netherlands National Museum of Natural History. The specimen was photographed by Christiane Quaisser, with the image being part of the Oriental Bird Club Image Database (OBI). This photograph, copyrighted by Naturalis, was added to the OBI on January 20, 2008, with the original location specified as Lesten, Aceh, North Sumatra, Indonesia.

Blue-wattled Bulbul   https://birdsoftheworld.org/bow/species/blwbul1/cur/introduction

Research and Conservation Implications The classification of the Blue-wattled Bulbul as Data Deficient highlights the necessity for targeted research and conservation efforts. Due to the limited information available, researchers are encouraged to conduct field studies to locate and observe the species in its natural habitat. Understanding the bird's feeding habits, breeding behaviors, and habitat preferences are crucial steps toward developing effective conservation strategies.

Furthermore, collaboration between local and international ornithological organizations can facilitate the sharing of data and resources, ultimately enhancing the conservation outcomes for Microtarsus nieuwenhuisii. Protecting the forests of Aceh is paramount, as habitat destruction poses a significant threat to the survival of this and other forest-dependent species.

Conclusion The Blue-wattled Bulbul (Microtarsus nieuwenhuisii) remains one of the most mysterious birds in Aceh, with its presence recorded only once in Lesten, Gayo Lues. The specimen held at Naturalis serves as a critical reference point for further studies. Given the bird's Data Deficient status, increased research efforts are essential to uncover its ecological needs and ensure its conservation. By preserving its habitat and conducting comprehensive field studies, we can hope to secure the future of this enigmatic species and contribute to the biodiversity of Aceh.

Bibliography

• Fishpool, L., Tobias, J. A., & Sharpe, C. J. (2023). Microtarsus nieuwenhuisii (Blue-wattled Bulbul). In Birds of the World. Version 1.1. Retrieved from  https://birdsoftheworld.org/bow/species/blwbul1/cur/introduction.
• Oriental Bird Club Image Database (OBI). (2008). Microtarsus nieuwenhuisii (Blue-wattled Bulbul). Retrieved from  https://macaulaylibrary.org/asset/726212
• Naturalis Biodiversity Center. (1937). Microtarsus nieuwenhuisii holotype RMNH.AVES.14044. Retrieved from  https://macaulaylibrary.org/asset/726212.