Black-bellied whistling duck is an omnivore (it eats both plants and meat). Its diet is based on seed, grass, sedges, corn, rice, wheat, insects, spiders and snails. Black-bellied whistling ducks live in large flocks of around 1.000 birds. They produce whistle-like calls, hence the name “whistling ducks”.Click to see full answer. Besides, what do you feed whistling ducks? Main Foods Taken Plant materials (sorghum [Sorghum vulgar], Bermuda grass [Cynodon dactylon], rice [Oryza spp.], smartweeds [Polygonum spp.], millet [Panicum spp.]). Animal foods (insects [Insecta], mollusks [Mollusca]) in lower frequencies ( (1967). Foods of the Black-bellied Tree Duck in south Texas.Subsequently, question is, how do you attract a whistling duck? In some areas (such as coastal Texas), feeding of this species has become popular, with landowners tossing out corn near ponds to attract hundreds of whistling-ducks. One may also ask, are whistling ducks good eating? Whistling ducks are tasty on the plate. A fairly new arrival on the Louisiana waterfowl scene is the black bellied whistling duck, which provides some good eating, according to LDWF waterfowl study leader Larry Reynolds. “They are a nasty duck.What do whistling ducks sound like?Most common vocalization is high-pitched, soft whistle described as a 4-syllable pe-che-che-ne in which the pe is long drawn (see Figure 2). Emitted during flight or while standing or swimming. Other calls in flight sound like chit-chit-chit and cheet-cheet.