Straw-headed Bulbul Census at Pulau Ubin, 4 June 2017.
Pulau Ubin is without doubt the most important site for the Straw-headed Bulbuls. This photo of three birds taken at by Ted Ng at Hindhede NP will be hard to get elsewhere in the region.
Few of the World’s endangered species have been more strongly associated with Singapore than the charismatic Straw-headed Bulbul. Wiped out from most of its Southeast Asian distribution by indiscriminate poaching, some of most significant populations of this largest of the world’s bulbuls have fortunately, found a safe home in Singapore. Pulau Ubin is without a doubt the most important site for the species.
To determine the size of its population on Pulau Ubin, the Bird Group conducted a pan-island survey of the Straw-headed Bulbul in conjunction with Pesta Ubin. Led by an experienced leader, teams of 3-4 surveyors covered 9 different transects totalling over 18 km across Ubin. This was the first time a targeted survey of the Straw-headed Bulbul has be carried out in Singapore, and attracted over 35 volunteer surveyors, including a large contingent of enthusiastic students from the National University of Singapore and Yale-NUS College.
Yong Ding Li back to camera briefing the surveyors at Pulau Ubin on the census. Photo: Lim Kim Chuah.
Along each transect, the teams stopped to record Straw-headed Bulbuls at defined points for five minutes. At the end of each ‘point count’ teams moved at least 250 metres from the previous point before conducted the next count. Datasheets were provided so that all surveyors could record their observations immediately.
So how many Straw-headed Bulbuls are there on Ubin? In total, the teams reported 68 individuals within a band of 100 m from their counting transects. Because some parts of Ubin were not surveyed, we expect the actual population to be even larger. The organising team is currently conducted statistical analysis on the dataset to calculate the densities of the bulbuls of the island. Building on the pioneering studies on the species carried out by veteran birdwatchers Ho Hua Chew and Trixie Tan, this survey confirms that Ubin remains a critical stronghold for the Straw-headed Bulbul and needs to be well-protected from poachers by regular ranger patrols.
Once again, we are grateful to all the survey leaders for leading the surveys along their transects. They include Lee Ee Ling, Lim Kim Chuah, Lim Kim Keang, Movin Nyanasengeran, Sandra Chia, Trixie Tan, Wong Chung Cheong and Yong Ding Li. We also thank Robert Teo and Germaine Leng from the National Parks Board for supporting our work.
Ding Li YONG
Fenner School of Environment and Society
Forestry Building, Linnaeus Way
The Australian National University
Canberra ACT 0200
Thanks to Ted Ng and Lim Kim Chuah for the use of the photos.