The Bataan sector of North Manila Bay, centred on the Balanga Wetland and Nature Park, is a compact but highly significant coastal wetland system comprising intertidal mudflats, mangroves, and fishponds. Despite its small size, the site supports internationally important waterbird populations, with several species exceeding the 1% flyway population threshold, including Kentish Plover Charadrius alexandrinus and Great Egret Ardea alba, alongside records of globally threatened species such as Far Eastern Curlew Numenius madagascariensis and Spoon-billed Sandpiper Calidris pygmaeus.

Beyond its avifaunal importance, the site provides critical habitat for coastal fisheries and supports local livelihoods, while also delivering important regulating and cultural ecosystem services. However, the wetland system remains under pressure from coastal development, habitat conversion, and pollution across Manila Bay, highlighting the need to strengthen protection, expand habitat restoration, and enhance integrated management to sustain its biodiversity and ecosystem services.

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