Muscovy Duck Wikipedia.org. The order Anseriformes contains about 150 living species of birds All species in the order are web-footed for efficient swimming and have a large wide bill with a specialized tongue that allows water to be sucked in the front of the bill. Ducks build their nests before the breeding season starts. The fulvous also occurs there and in Florida with occasional stragglers further north along both coasts and the Mississippi Valley. Population . However, the ducks are waterfowl species mainly found in the South US and tropical South America. When we think of ducks, we mostly picture the mallard ducks or those that are found in local ponds. Both species are primarily Mexican. The whistling ducks possess long necks and legs, and are very gregarious; they fly in large flocks to and from night-time roosts. Black-bellied whistling ducks are susceptible to over-harvest due to their unwary nature. This duck is also called Mexican Squealer in the southern part of the USA. 6. The whistling swan is the most common swan species of North America, estimated to number almost 170,000 individuals around 1990. There are at least twenty-eight types of ducks living in North America, not included in these waterbirds, the eiders, loons, mergansers, smews, scoters and teals. These are large types of ducks that are native to South America and Mexico but are slowly reaching parts of the Untied States. They form flocks in the winter and feed by dabbling or diving, eating mostly aquatic plants. The trailing legs and rounded wings of these slow flying ducks makes them look bigger than they are. Ducks have been categorized into different groups such as whistling ducks, teal ducks, and wood ducks. These are monogamous species and they breed only once in a year. It is the common breeder in Florida. Black-bellied whistling ducks commonly feed at night on grain, seeds, some insects and mollusks and leaves and shoots found in fields and shallow water. The Black-Bellied Whistling Duck is also known as Black-Bellied Tree Duck. Duck Identification Guide: All the Types of Ducks With Pictures. Whistling Duck Waterfowl Identification. They prefer to live in the nest as compared to water. These ducks nest among vegetation by the lakeside and lay pale green eggs. An array of plates traps food particles as the water is expelled out the sides of the bill. However, know that there are many types of ducks, and BirdEden categorizes them accompanied by their identification features and pictures to help you understand them well. In the U.S., the black-bellied is found only in south Texas and Louisiana. Among these different types, the birds can be grouped again into puddle, aka "dabbling" and diving ducks. Both the males and female have the same plumage, and all have a hunched appearance and display black underwings during flight; they also exhibit same behaviours -including mutual screening in some species. D. a. autumnalis (Caribbean) between 100,000-1,000,000; D. a. bicolor (Neotropics) >1,000,000 (Rose and Scott, 1994).