Wetlands are found in almost every region of the world and are  considered the most biologically diverse of all ecosystems. They provide  habitat for a great number of water and land species. They are also an  important environment to many migratory bird species. Types of wetlands  include swamps, bogs, marshes and estuaries. An overview of some the  most 
important wetlands in the world.
10Camargue 
The Camargue encompasses the Rhone River delta in the southeast of  France. Approximately a third of the Camargue is either lakes or  marshland. It is one of the best places in Europe for bird watching. Its  brine ponds provide one of the few European habitats for the greater  flamingo. It is also famous for the Camargue Bull and the Camargue  Horse.
9Wasur National Park 
Wasur National Park is a massive wetland region in the Indonesian  province of Papua, on the island of New Guinea. Dubbed the Serengeti of  Papua owing to its incredible biodiversity, Wasur National Park  maintains a large number of rare animals and birds. The best place for  spotting wildlife in Wasur National Park is Rawa Biru Lake, which is  part of the wetlands. There are many water fowl species and migrant  birds here along with cassowaries and wallabies. Unfortunately the park  natural flooded grassland systems are threatened by the invasion of  alien species such as water hyacinth and mimosa pigra.
8iSimangaliso Wetland Park 
The iSimangaliso Wetland Park (previously known as Greater St. Lucia  Wetlands Park),  is one of the most diverse region in South Africa’s  KwaZulu-Natal province. iSimangaliso is well known for its extensive  wetlands, sand dunes, beaches and coral reefs. Animals occurring on the  park include elephants, leopard, black and white rhino, buffalo, and in  the ocean, whales, dolphins, and marine turtles.
7Mekong Delta 
The Mekong Delta is the region in southern Vietnam where the Mekong  River approaches and empties into the sea. It is a very rich and lush  area, covered with rice fields, that produces about half of the total of  Vietnam’s agricultural output. Subsequently, life in the Mekong Delta  revolves much around the river, and all the villages are often  accessible by river rather than by road.
6Kakadu Wetlands 
Kakadu National Park is a diverse park about half the size of  Switzerland located in the Northern Territory of Australia. The park’s  wetlands provide one of the best wildlife viewing opportunities. The  freshwater and saltwater crocodiles sleep on the banks of the many  rivers and billabongs for most of the day but can also be seen floating  or swimming in the water. One of Kakadu’s best known landmarks is the  Yellow Water billabong.  Located near the small settlement of Cooinda,  Yellow Water is home to crocodiles, wild horses, buffalo and other  wildlife. The billabong, which floods to join other waterways during the  tropical season, also attracts millions of migratory birds each year.
5Kerala backwaters 
The Kerala backwaters are a chain of lagoons and lakes lying parallel  to the Arabian Sea coast in the Kerala state in southern India. The  network includes five large lakes linked by canals, both manmade and  natural, fed by 38 rivers. The backwaters are home to many unique  species of aquatic life including crabs, frogs and mudskippers, water  birds and animals such as otters and turtles. Today, houseboat tourism  is the most popular activity in backwaters, with several large  Kettuvallams (traditional rice boats, now converted into floating  hotels)ply the waterways.
4Everglades 
Located in the state of Florida, The Everglades are a vast, shallow,  slow moving river of grass that extends from Lake Okeechobee to Florida  Bay. During the dry season it dries up except for the deeper places. The  region is home to over twenty different kinds of birds and hundreds of  other species.  Many pets have escaped or been released into the  Everglades from the surrounding urban areas. Native to southern Asia,  the Burmese python is now competing with the American Alligator, the  largest reptile in North America, for the top of the food chain. In 2009  agents removed more than 1,200 Burmese pythons from the Everglades  National Park.
3Okavango Delta 
The Okavango Delta in Botswana is one of the world’s great inland  waterways. It is formed where the Okavango River empties onto a basin in  the Kalahari Desert, where most of the water is lost to evaporation and  transpiration instead of draining into the sea. The Okavango delta is  famous for its wide variety of wildlife. Species include elephant,  hippopotamus, giraffe, crocodile, lion, cheetah,  rhinoceros and zebra.  The majority of the estimated 200,000 large mammals in and around the  delta are not year round residents. They leave with the summer rains and  make their way back as winter approaches.
2Sundarbans 
The Sundarbans is the largest littoral mangrove belt in the world  spreading  across Bangladesh and West Bengal in India. The name  Sundarban can be literally translated as “beautiful jungle” in the  Bengali language.  Several predators dwell in the labyrinth of channels,  branches and roots that make up the region including about 500 Bengal  tigers. Unlike in other habitats, here tigers live and swim among the  mangrove islands, where they hunt prey such as the Chital deer and Wild  boar. The tigers do also regularly attack and kill humans who venture  into the forest. Some of the reptiles are predators too, including two  species of crocodile, the Saltwater Crocodile and Mugger crocodile.