Wetlands are considered the most biologically diverse of all ecosystems, and occur naturally on every continent except Antarctica. Serving as home to an astonishing variety of plant and animal life, wetlands also serve as an important environment to many bird species. The water in wetlands is either freshwater, brackish, or saltwater, and wetland types include swamps, bogs, and marshes. Most of these unique and fragile ecosystems are protected. But all remain vulnerable to climate change and the effects of human impact.
Click through the following gallery and travel the globe to see the best wetlands in the world.