This species tends to occur in small groups (2), which feed during the day and night, but are most active at dawn and dusk (4). This duck feeds on invertebrates and plant matter whilst wading, sifting through the water with the bill (6). Pair formation and breeding occurs during the wet season (from December to March) (6). Nesting occurs in cavities in tree trunks, particularly in black mangrove trees (6). Pairs are monogamous and very territorial, defending their nesting site aggressively against intruders. About six eggs are laid, which hatch after around four weeks. After a further six weeks the chicks will have developed adult plumage and will begin to fly (6).