Singapore’s Housing & Development Board (HDB) announced on Dec. 11 that a 7‑hectare green patch – roughly the size of ten football fields – will be cleared to make way for the Chencharu housing estate in Yishun, slated to begin in late 2026. The site, bounded by Sembawang Road, Yishun Avenue 1‑2 and Yishun Walk, is a critical stepping‑stone habitat for the critically endangered straw‑headed bulbul and a dozen other native species, including the Sunda pangolin.
Development plan and environmental assessment
The environmental impact assessment (EIA) was commissioned by the National Parks Board (NParks) on HDB’s behalf. Conducted by sustainability consultancy Jacobs and biodiversity consultancy Camphora, the 140‑page report maps the existing vegetation – about 40 % of which is mature secondary forest that has reclaimed abandoned plantations – and evaluates its ecological value. While the assessment did not identify any area of “high ecological value,” it flagged 27 threatened native plant species, 14 of which are considered conservation priorities.
According to the report, the forest harbours vulnerable species such as the fern Microlepia speluncae and two fig trees that provide year‑round fruit for frugivores. The EIA also recorded the presence of 41 fauna species of conservation concern, though field surveys between Aug. 2024 and Jan. 2025 detected only five, including the Sunda pangolin, a species listed as “critically endangered” by the IUCN.
Singapore’s role as a global bulbul stronghold
Singapore hosts about a third of the world’s wild straw‑headed bulbul population – fewer than 1,700 mature individuals globally, according to the International Union for Conservation of Nature (IUCN) and recent Straits Times reporting. The bird’s melodious song makes it a prized target in Southeast Asia’s illegal cage‑bird trade, where it is listed on CITES Appendix I, prohibiting commercial trade.Reuters confirmed the up‑listing took effect on Nov. 25, 2023, after a joint petition by Singapore, Malaysia and the United States.
Local conservation groups, notably the Nature Society Singapore (NSS), have long championed the species. NSS’s “Straw‑Headed Bulbul Working Group” and the National Species Action Plan – a five‑year strategy released by NParks, NSS and BirdLife International – aim to monitor populations, safeguard habitats and improve genetic diversity.NParks action plan.
Proposed mitigation measures
In response to the EIA, HDB pledged to retain “urban micro‑forests” and create linear green strips along Yishun Avenue 1. The plan calls for planting native flora that mimics the natural forest structure, especially in the south‑eastern corner of the site. HDB also said it would assess the feasibility of retaining large trees and salvaging saplings of conservation significance.
Senior lecturer and biologist N. Sivasothi of the National University of Singapore, consulted on the project, said the retained patches would act as “lifelines” for birds, bats and pollinators moving between Nee Soon Swamp Forest, Springleaf Nature Park and northern reserves. “Creating patches gives them a fighting chance instead of leaving them with an urban desert,” he told the media.
Expert commentary on habitat connectivity
Low Bing Wen, senior manager of biodiversity at NParks, highlighted that Singapore’s success with the bulbul stems from its tolerance for secondary and edge habitats, unlike the dense primary forests required elsewhere. “Our biggest challenge overseas is trapping for the cage‑bird trade. Here we focus on improving connectivity between Pulau Ubin and mainland habitats,” she said.
The EIA warned that clearing the site could exacerbate human‑wildlife conflict, notably with long‑tailed macaques that are attracted to food waste. It recommended public advisories to mitigate such clashes.
Public consultation and next steps
The draft EIA is open for public feedback from Dec. 11 to Jan. 7 via HDB’s “Planning with the Environment in Mind” portal. Stakeholders, including local bird‑watching groups and NGOs, are urged to submit comments on habitat retention, species monitoring and anti‑poaching measures.
Chencharu’s housing component will accommodate about 10,000 new homes by 2040, with 80 % earmarked for public housing. The development is part of a broader Build‑to‑Order strategy that has attracted strong demand—three applications per available flat, according to HDB data.
Broader conservation context
The case underscores a growing tension in rapidly urbanising cities: balancing housing needs with biodiversity preservation. Singapore’s experience mirrors global trends where metropolitan areas become inadvertent refuges for threatened species when robust legal frameworks, community engagement and targeted habitat corridors are in place.
As the nation moves forward with the Chencharu project, the effectiveness of HDB’s mitigations will be closely watched by regional conservationists. Success could reinforce Singapore’s reputation as a world‑class model for integrating habitat preservation into high‑density urban development.
