Climate change threatens the habitat of the Lesser Whistling Duck

The Lesser Whistling Duck remains a familiar presence in Bangladesh’s wetlands, but habitat loss, pollution and hunting are increasing pressure on a species closely tied to aquatic ecosystem health.

In the quiet wetlands of Bangladesh, a gentle whistling sound often drifts across the water at dusk. It comes from the Lesser Whistling Duck, a species that reflects the richness and resilience of the country’s aquatic ecosystems.

The medium-sized duck, scientifically known as Dendrocygna javanica, is widely found in shallow lakes and wetlands across Bangladesh. Recognisable by its soft melodic calls, the bird is largely nocturnal and is frequently seen in flocks resting or feeding in calm water bodies.

The species is partially migratory. During winter, birds from northern parts of Asia travel south through India before reaching the warmer wetlands of Bangladesh. Their seasonal arrival adds to the ecological diversity of these habitats.

Lesser Whistling Ducks are omnivorous. They feed mainly on aquatic plants, grains and seeds along with small invertebrates. Through their feeding habits, they contribute to seed dispersal and play an important role in maintaining wetland ecosystems.

Despite their adaptability, the species faces growing threats. Habitat loss driven by agricultural expansion, urbanisation and pollution is shrinking their natural environment. Illegal hunting during migration periods also remains a concern.

The species is currently classified as ‘Least Concern’ by the IUCN, indicating a stable global population. However, experts note that localised declines have been observed in some areas.

Conservation efforts in Bangladesh, including wetland restoration and community awareness programmes, are seen as key to protecting the species and its habitat.

Unlike many other ducks, the Lesser Whistling Duck often roosts in trees. Its distinct whistling calls help individuals communicate and locate one another within dense vegetation.

For conservationists, the bird stands as a reminder of the importance of safeguarding wetlands. Protecting these habitats not only ensures the survival of the species but also preserves the country’s broader natural heritage.

Efforts to conserve wetlands are essential to keep the soft whistles of these birds echoing across Bangladesh’s landscapes.