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152-156 cm. Very large waterbird; naked red head and upper neck diagnostic, long bill; reddish legs; light grey body plumage with blackish flight feathers and primary coverts, secondaries whitish grey.
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The species was once found all over Thailand. It is now extinct in the
country. Former records were from Chiang Rai; Chiang Mai; Kham Phang
Phet; Nakhon Sawan; Ratchaburi; Phetchaburi; Chumphon; Songkhla;
Pattani; Satun.