A wetland is a type of land that is characterized by its saturation with water, either permanently or seasonally. This can include marshes, swamps, bogs, and fens, among others. Wetlands are unique ecosystems that support a diverse range of plant and animal life, including many species that are not found elsewhere. They also play an important role in regulating water flow, filtering pollutants, and providing natural habitats for wildlife. Due to their environmental importance, wetlands are often protected by law and may require permits before any development or alteration can take place.