 Other notable wetlands are Ahukawakawa Swamp, Aramoana, the Kepler Mire, Kai Iwi Lakes, the Sinclair Wetlands, and Te Henga, as well as areas around the lower reaches of the Waikato River.In the past 150 years New Zealand has lost about 90% of its wetland areas due to draining for farming.Many remaining wetlands are also degraded due to pollution, grazing, drainage and presence of invasive plants.