 The fulvous whistling duck feeds in wetlands by day or night on seeds and other parts of plants . It is sometimes regarded as a pest of rice cultivation , and is also shot for food in parts of its range . Despite hunting , poisoning by pesticides and natural predation by mammals , birds and reptiles , the large numbers and huge range of this duck mean that it is classified as Least Concern by the International Union for Conservation of Nature ( IUCN ) . 
