- 66-81 cm. Large wild duck, all dark chestnut brown body, contrasting strongy with whitish head and upper neck with variably mottled blackish; lesser and median upperwing coverts and inner edge of tertials white, secondaries bluish-grey. Bill is black-mottled orange. female : smaller and slightly duller in coclor.

- Pool and rivers in forest, freshwater swamp forest, up to 900 m.

- กระบี่,กำแพงเพชร,ฉะเชิงเทรา,ชัยภูมิ,ชุมพร,เชียงใหม่,ตรัง,ตาก,นครศรีธรรมราช,นราธิวาส,บุรีรัมย์,ประจวบคีรีขันธ์,พัทลุง,เพชรบูรณ์,เลย,ศรีสะเกษ,สกลนคร,สุราษฎร์ธานี,อุตรดิตถ์,อุบลราชธานี

- Records are from Chiang Mai (Doi Inthanon NP); Tak (Thung Yai
Naresuan WS, Umphang WS); Uthai Thani (Huai Kha Khaeng WS);
Kamphaengphet (Mae Wong NP); Loei (Phu Luang WS, Phu Kradueng
NP, Mae Nam Phong); Chaiyaphum (Phu Khieo WS); Phetchabun (Nam
Nao NP); Phitsanulok (Phu Hin Rong Kra NP); Sakon Nakhon (Phu Phan
NP); Buriram (Sanambin NHA); Si Sa Ket (Huai Sa La WS, Phanom
Dongrak WS, Khao Phra Wihan NP); Ubon Ratchathani (Phu Jong-Na
Yoi NP, Yot Dom WS) ; Chachoengsao (Khao Ang Ru Nai WS); Prachuap
Khiri Khan; Chumphon (Ban Krun); Surat Thani (Ban Kok Klap);
Phangnga; Nakhon Si Thammarat (Thung Song); Krabi (Nong Kok, Nong
Tao, Khao Nor Chuchi); Trang (Ban Khuan Khan, Khao Chong);
Phatthalung and Narathiwat (Chalerm Prakiat WS).