The duck is a web-footed aquatic bird of the genus Anatidae in the genus Anseriformes. Many species of ducks are migratory, while some live permanently in one place. Their three toes are connected to each other by skin. All duck lips are flat. The edges of the lips are notched like a comb. As a result, they can filter food from water. The neck of the duck is relatively long and the body is plump but neat. The wings have been shown solely to give a sense of proportion. The neck and legs of a duck are much shorter than the neck and legs of a goose and a swan. Duck eggs do not have spots. The body of a newborn duckling is covered with soft feathers or small feathers. The goose pulls the soft feathers from its chest and always arranges the soft feathers on the edge of the house. During this time they release flight feathers from their wings; As a result, ducks cannot fly for a month or until the next breeding season. Ducks are divided into two groups: dabbling ducks and diving ducks. In addition, there is chakha or chakrabak.Floating ducks graze on water. Usually does not like to dive, but can dive when young or unable to fly. Almost all duck fins have wing speculum which looks like bright white buds. The body color of the female duck is usually brown, but the color of the male duck becomes more varied and attractive especially during the breeding season. In terms of body color, male ducks also come to life when they look like a goose. The hind fingers of the duck are small and short and not fragmented.
The floating duck not only makes food by sifting from the surface of the water, but also collects food from the surface by dipping the head, neck and upper part of the chest in water at an angle of about 90 degrees. In this way they can collect seeds and tubers of aquatic plants and worms and snails from the shallow mud of lakes, beels, ponds and estuaries. All species of diving ducks belong to the genus Anas. All but one of the dozen or so ducks in Bangladesh are migratory. These include: Mallard (Anas platyrhynchos), Pintail (Anas acuta), Pantamukhi or Khunte duck (Anas clypeata), Gargane / blue-winged til or small duck (Anas querquedula), Gadwall / Pyong duck (Anas querquedula) and Anas (Anas penelope). The first male of the domesticated ducks of this country is Mallard or Nilshi Bunohans.
Spotbill Duck or Anas poecilorhyncha is a native of Bangladesh. The tip of the lips of this domesticated duck is yellow. There are two red spots at the base of the upper jaw. Other permanent residents are Cotton Till / Nettapus coromandelianus, Laser Whistling Till / Dendrocygna javanica, Large Whistling Till / Dendrocygna bicolor. All three birds nest in tree hollows and are also called tree ducks. Sand ducks can be seen in all parts of Bangladesh. Two more large ducks are residents of Bangladesh. These are the Sarkidiornis melanotos and the white-winged duck or Cairina scutulata. Buncha ducks are sometimes seen in the char areas of Padma and Jamuna. It is known that there are still a few pairs of swans in the protected forests of Kasalang valley in Rangamati hill district. They swim underwater and catch fish and build nests in civet, uri mango and china curry. Badihans are listed as an endangered species in Bangladesh.
The diving duck's back finger is wide and divided into several pieces. The duck uses this finger to swim comfortably and quickly. They collect food by diving and swimming under water. Their main food is fish, shrimp, aquatic insects and other small aquatic animals. The call of the goose and the goose is different. The goose has black feathers on its body. All pochards (Anthya spp) swim in the water. There are six species of pochard in Bangladesh. Commonly seen are: Tufted Pochard or Tufted Duck / Bamunia Duck, (Aythya fuligula), White Eyed Pochard or Feruginus Duck / Rangamuri or Duck (Aythya nyroca) and Common Pochard / Common Duck (Aythya ferina). Others in the group are Bear's Pochard / Aythya Baeri and Scope-Dak or Shop Duck (Aythya marila). The record of seeing big hawks in Bangladesh is only a handful. The remaining species of ducks are scattered in large numbers from the southern estuary to the southeastern Bils. Laljhunti Pochard or Rangamuri (Netta rufina) floats and dives simultaneously. These ducks are quite noticeable in haors and big beels.
The other two large migratory ducks are: Rady Sheldak (Tadorna ferruginea) and Common Sheldak / Shachkha or Shahchakha (Tadorna tadorna). Radi Sheldak is seen flocking to the char areas of Greater Barisal, Greater Noakhali and Greater Chittagong Districts. [Ali Reza Khan]
Cock duck is a large endangered species of the genus Anseriformes, belonging to the genus Anatidae, Sarkidiornis melanotos. It is also known as Nukta. At the base of the male duck's beak is a fleshy knot or comb-like piece of meat. The knot is quite swollen during breeding. The surface of the body is bluish black. The back of the back is gray.Black dots on the head and neck white. The secondary feathers of the wings are bronze in color. A black stripe across half of the chest. The female duck is relatively dirty and small. The duck is about 6 cm in length. They are skilled in flying, walking and diving. During the day the tree sits still; The number of family members is 4-10, sometimes 25-30. Mainly herbivores; Food grains, aquatic plant seeds and rice; Sometimes eats frogs and insects. It nests in naturally formed hollows at medium height on the trunks of ancient trees by the water. The nest is enclosed or enclosed by sticks, grass, dry leaves and feathers.
The nesting season is July-September. The number of eggs in a bunch is 8-15. They are found in large wetlands of the country, especially in most of the wetlands in the north-east. It is also found in Pakistan, India, Nepal, Myanmar, China (southeast) and several countries in Africa. [Md. Anwarul Islam]
The white – winged duck is a critically endangered duck (Cairina scutulata) of the genus Dendrocygnidae (formerly Anatidae) of the genus Anseriformes. The upper part of the body is glossy black, the base part is dark brown, the head and neck have white white feathers with black dots.A large white color at the base of the wing. It can be distinguished from a comb duck of the same size by the white spots on the wings and the dark brown color of the underside of the body. 6-71 cm in length; The female duck is smaller in size than the male duck. They live in pairs or in small groups with 5-6 ducks. During the day they take shelter in certain ponds of the forest, fly in the evening to eat in the wetlands. Their eating habits in the wild are not known; They are omnivorous in captivity, but prefer animal food. Nests in tree holes. Sometimes a few sticks, grass and leaves are spread in the hole. Lays 8-10 eggs at a time, lays eggs for about 30 days.
They live in closed forest reservoirs or damp evergreen mixed forests in the protected forest at Kasalong in the southeastern Chittagong Hill Tracts. Habitat destruction and hunting are big threats for them. The species is also found in India, Myanmar, China, Thailand, Vietnam, Laos, Cambodia, Malaysia and Indonesia.
