Rugezi marsh is located in an inundated valley in the north of Rwanda, to the east of Lake Burera on Uganda border. The vegetation of the marsh is dominated by Miscanthidium violaceum with stands of Cyperus latifolius around the fringes and an area of papyrus near the point of outflow. Average annual rainfall is estimated at 1,200 mm.
The marsh has three globally threatened species namely; Papyrus Gonolek, Lesser Swamp Warbler and Grauer’s Rush Warbler. Also one species of the Afrotropical biome, 1 of the 25 species of the Albertine Rift Mountains Endemic Bird Area and 6 of the 11 species of the Lake Victoria Basin biome that occur in Rwanda have been recorded at Rugezi Marsh.