Philippine Duck (Anas luzonica) by alabang, on Flickr
Anas luzonica is endemic to the Philippines, being recorded from all the major islands and eight smaller islands. Records since 1980 derive from c.30 localities, most on Luzon and Mindanao. Records from Siquijor and the Sulus remain unsubstantiated. A steep population decline was evident by the mid-1970s, with high numbers recorded at only a few sites in the following decade, e.g. Candaba Marsh (Luzon) which probably supported many thousands in the early 1980s. Subsequent local extinctions and near-disappearances have occurred in several significant sites, including Candaba Marsh and Buguey wetlands (where several thousand were recorded in 1983). Important current areas include Polillo Island (240 seen and an estimated 3,000 present in 1996), Subic Bay (600 seen in 1997), Magat dam (2,000 were seen in 2001) and Malasi lakes (1,320 were recorded in 2002), Luzon. Other recent records come from Mangatarem, Pangasinan (east of Zambales Mountains IBA) where 70 individuals were counted on the Barabac River inside the Manleluag Spring National Park, Cantilan mangroves in Surigao del Sur and from a mangrove fishpond in Bicol Region, Southern Luzon1. In 1993, its population was estimated at 10,000-100,000, but by 2002 fewer than 10,000 birds were thought to remain.