25/05/2026
Did you know that Manguo Swamp in Limuru — a 74-acre freshwater wetland located just outside town along the Nairobi-Nakuru highway — once harbored hippos and attracts rare bird species from across the globe,
The reason you have never seen a visible inlet feeding the swamp is that Manguo is not fed by a surface river or stream. Instead, its water comes from surface runoff collecting from the surrounding hills during rainy seasons, combined with underground seepage and a naturally high water table in the area .
The swamp sits in a natural depression that acts like a basin, with water percolating up from below and draining from higher elevations around Limuru rather than flowing in through an open channel. During the long rains between April and June, water can rise to a depth of about 6 feet (nearly 2 meters), and in the past, the swamp would flood so extensively that walking through it was impossible
In previous decades, hippos lived in Manguo before human activity following Limuru's urban expansion forced them to migrate away. For birdwatchers, the swamp remains a hidden gem, hosting rare species such as the Maccoa duck and the Gadwall, alongside Egyptian geese, yellow-billed ducks, black-winged stilts, and Kikuyu white-eyes. However, Manguo faces serious pressures: dumping of solid waste, encroachment through building on riparian land, overgrazing, and cultivation too close to its edges
While the swamp has not completely dried up — contrary to some exaggerated reports — its water levels have fluctuated dramatically in recent years, with severe droughts visibly reducing its extent. An ironic additional challenge is that part of the swamp's natural outlet was blocked decades ago, causing occasional flooding during heavy rains that threatens nearby homes and the main highway. Scientists point to Manguo as a warning sign for wetlands across Kenya, whose value remains largely underappreciated despite their critical role in providing water, supporting biodiversity,