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Chyi Yin Gwee
Department of Biological Sciences, National University of Singapore

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Journal : Treubia

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INTEGRATIVE TAXONOMY REVEALS CRYPTIC ROBIN LINEAGE IN THE GREATER SUNDA ISLANDS Elize Y. X. Ng; Arya Y. Yue; James A. Eaton; Chyi Yin Gwee; Bas van Balen; Frank E. Rheindt
Treubia Vol. 47 No. 1 (2020): Vol. 47, No. 1, June 2020
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/treubia.v47i1.3872

Abstract

Southeast Asian avifauna is under threat from both habitat loss and illegal poaching, yet the region’s rich biodiversity remains understudied. Here, we uncover cryptic species-level diversity in the Sunda Blue Robin (Myiomela diana), a songbird complex endemic to Javan (subspecies diana) and Sumatran (subspecies sumatrana) mountains. Taxonomic inquiry into these populations has previously been hampered by a lack of DNA material and the birds’ general scarcity, especially sumatrana which is only known from few localities. We demonstrate fundamental bioacoustic differences in courtship song paired with important distinctions in plumage saturation and tail length that combine to suggest species-level treatment for the two taxa. Treated separately, both taxa are independently threatened by illegal poaching and habitat loss, and demand conservation action. Our study highlights a case of underestimated avifaunal diversity that is in urgent need of revision in the face of imminent threats to species survival.
A COLOURFUL NEW SPECIES OF MYZOMELA HONEYEATER FROM ROTE ISLAND IN EASTERN INDONESIA Dewi Malia Prawiradilaga; Pratibha Baveja; Suparno Suparno; Hidayat Ashari; Nathaniel Sheng Rong Ng; Chyi Yin Gwee; Philippe Verbelen; Frank Erwin Rheindt
Treubia Vol. 44 (2017): Vol. 44, December 2017
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/treubia.v44i0.3414

Abstract

The avifauna of Rote Island in the Lesser Sundas is not well studied and generally considered to be similar to that of adjacent Timor Island. However, some cases of bird endemism have recently been documented on this island. A population of Myzomela honeyeater is one such example. First observed in October 1990, it has been subsumed with Myzomela dammermani from Sumba Island given its superficially similar appearance. Based on extensive morphological inspection and bioacoustic analysis, we here describe this population as a new taxon to science. Apart from previously overlooked plumage distinctions, the new taxon bioacoustically differs from M. dammermani in the presence or absence of several unique call types and considerable differences across two parameters in shared call types. Considering the importance of bioacoustics in avian species delimitation, we propose that the new Rote Myzomela be considered a distinct species. Given continued habitat conversion across its small range, we propose the International Union for Conservation of Nature and Natural Resources (IUCN) threat status Vulnerable for the species.
Co-Authors Arya Y. Yue Bas van Balen Dewi Malia Prawiradilaga Elize Y. X. Ng Frank E. Rheindt Frank Erwin Rheindt Hidayat Ashari James A. Eaton Nathaniel Sheng Rong Ng Philippe Verbelen Pratibha Baveja Suparno Suparno