Question

Name a bird which can swim in water.

Answer 1

Well known diving birds who have evolved special adaptations according to their habitat such as webbed feet for swimming and waterproof feathers for flying or diving.

Complete answer:
There are many birds which can fly and swim. The family anserdia which is known as the duck family would be present everywhere. In the anserdia family species are duck, geese and swans. The swans and geese are the semiaquatic and few of ducks are dabbling ducks which means who swim above the surface of the water, some are diving ducks who dive into the water and swim below the surface of water.
Some of the water birds are more terrestrial or aquatic than others; their adaptation will vary depending on the environment around them. Some examples of water birds are marine birds, penguins, gulls, shorebirds etc swimming birds are highly delicate and have specialized organs. These birds divide themselves according to environmental conditions as they live most of the in water and come to terrestrial areas only during mating or some may live on land and go to aquatic regions when they have to breed or to fulfill their basic needs. Many familiar swimming birds groups are and most importantly:
Wading birds and diving ducks
Wading birds occupy both fresh water and salty water environments. These birds find their food by stirring the water with their feet while other species use their beaks to find food.
Diving birds are a broad group of species which want water deeper than the wading birds. They can dive into the water and can swim after the fish. For example THE AMERICAN WIDGEON is the most common duck that spends lots of its time under the water.

Penguin
Penguins are the most aquatic among other diving birds. Penguins possess streamlined bodies and they are well adapted to the surrounding and for underwater swimming.
These are some examples of the birds who can swim.

Note: Some seabird species utilize surface feeding or plunge diving during foraging in which gravity or momentum is used to counteract buoyancy effects for a short period of time. Other species can remain underwater for longer periods of time.