Penang wetland hosts 20,000 migratory birds each season

Up to 20,000 migratory birds pass through the Teluk Air Tawar-Kuala Muda coast in Seberang Perai each peak season, making it one of Malaysia’s most significant but least-known wildlife habitats.

The 10km coastal stretch, traversed by four rivers, has been documented for more than two decades by Tan Choo Eng, a plastics scientist and secretary of the Penang branch of the Malaysian Nature Society (MNS).

Species recorded at the site include the critically endangered Spoon-billed sandpiper, along with the endangered Nordmann’s greenshank and Far Eastern curlew, positioning the wetland as a key stopover on a migration route stretching from Russia to Australia and New Zealand.

Two decades of documentation reveal a hidden biodiversity hub

Choo Eng has spent over 20 years visiting and documenting the flora, fauna, and wildlife of the Teluk Air Tawar–Kuala Muda Important Bird and Biodiversity Area, located along four rivers in northern Seberang Perai.

The birds follow the East Asian–Australasian Flyway, arriving from as far as the Russian Far East before “overwintering” at the site for around six months and returning north the following spring.

Beyond birds, Choo Eng’s work with MNS extends to identifying snakes, reptiles, amphibians, and mammals in the area, including a Leopard cat recorded recently at the site. Choo Eng has described the coastal strip as a “hidden gem,” noting that its limited visibility remains puzzling given its ecological importance to biodiversity and climate resilience.

Lack of protection leaves the habitat vulnerable

In 2013, BirdLife International identified the area as being at very high risk of land conversion, citing the absence of a buffer zone separating it from developed land.

The wetland is currently recognised locally as an ecologically sensitive area, but this designation falls short of the stronger legal protections conservationists say the site needs.

Plastic debris has been observed accumulating along the high-tide mark near the Sungai Abdul river mouth, pointing to pollution as an ongoing threat alongside development pressure.

The mangrove swamps lining the coast also serve a practical purpose for nearby communities, helping to protect the area from flooding and tsunamis while supporting local fishing villages.

Think City backs push for international recognition

Think City is working with conservation partners to pursue international recognition for the site under the East Asian–Australasian Flyway Partnership and the Ramsar Convention on wetlands of international importance.

Such recognition would raise the wetland’s profile and strengthen its case for legal protection, while also enhancing its appeal as a sustainable eco-tourism destination.

Local infrastructure already points toward this potential, with a small boatyard, fishing community, and nearby eateries offering a starting point for community-based tourism initiatives.

Balancing conservation, education, and local livelihoods remains a central challenge for Think City and MNS as they continue engaging stakeholders on the site’s long-term future.

Residents and visitors interested in the wetland’s birdlife can expect further updates as recognition efforts progress at the international level.