The Singapore Zoo is a very convenient place to appreciate endangered species up close. I took a photo of this White-Winged Duck, which is the state bird of the Indian State Assam, a place known for its famous Assam black tea.
This species could be seen in north-east India and Southeast Asia (down to Sumatra). However, the population is believed to have decreased to about 800 by 2002 due to ongoing habitat loss caused by plantation expansion (like many other species) and unregulated poaching of eggs, pets and food.
Although the white-winged duck can be confused with the white-headed duck (Oxyura leucocephala), the latter is smaller, has a distinct blue bill (in case of male), and inhabit different regions like Spain, North Africa, western and central Asia.