Sites - Important Bird and Biodiversity Areas (IBAs)
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Ruwenzori (Rwenzori) Mountains National Park
29o 58.44' East 0o 23.58' North
A1, A2, A3
1,700 - 5,110m
Year of IBA assessment
Site description The park, which includes Uganda’s highest point, Margherita, rises from the floor of the Western Rift Valley. It is contiguous with the Virunga National Park of the Democratic Republic of Congo (IBA CD010). The park covers an extremely steep and rugged mountain range, whose highest peaks are permanently covered with ice and snow, although this is retreating. The natural vegetation is determined largely by altitude, with five distinct zones. In the lower-lying areas (below c.2,400 m, though up to 3,800 m in sheltered valleys), the vegetation is montane forest, characterized by trees of Symphonia, Prunus, Albizia, Dombeya and others. There are few large trees and the canopy is very open, except in valley bottoms and on ridge-tops where the gradient is comparatively gentle. This area occupies about 240 km². Bamboo Arundinaria forms almost pure stands in many areas between 2,500 and 3,000 m. Above c.3,800 m, a tree-heath occurs, in which giant heather Phillipia forms dense thickets, although in more sheltered places there is a mixture of stunted trees and tangled undergrowth. Above this, up to the snow-line at c.4,400 m, is an Afro-alpine moorland zone. In total, forested and wooded areas cover c.55,000 ha of the park. Although the fauna of the park may not be easily seen, the attraction which makes the Rwenzoris so famous is the remarkable spectacle of snow and ice-covered peaks in the centre of Equatorial Africa.
Key Biodiversity See Box and Tables 2 and 3 for key species. In total, 217 species have been recorded in the park, but given that it has not been comprehensively surveyed, further additions are to be expected. The park contains the second highest number of Albertine Rift endemics of any IBA in Uganda, and the second highest number of species of the Afrotropical Highlands biome, both after Bwindi (IBA UG004). There is an unconfirmed report of the globally near-threatened Coracina graueri. The species of the Afrotropical Highlands biome include some spectacular or rare birds, such as Musophaga johnstoni, Bradypterus alfredi, Nectarinia reichenowi, Nectarinia johnstoni and Nectarinia stuhlmanni. Seventeen species of the Guinea–Congo Forests biome also occur, but all are well represented in other sites.
Non-bird biodiversity: Two species of forest tree, Hypericum bequaertii and Schefflera polysciadia, are only known from Rwenzori, and seven others are restricted to Rwenzori and other montane forests of the south-western border areas of Uganda. Twenty-five species of invertebrate new to science have been described from the area in the last 15 years. Mammals of conservation concern include Cephalophus nigrifrons rubidus (EN), Loxodonta africana (EN), Pan troglodytes (EN), Colobus angolensis ruwenzorii (VU) and Cercopithecus l’hoesti (LR/nt); subspecies of Cercopithecus mitis and Procavia capensis are only known from this park.