Mt. Elgon is a gently-sloping, comparatively isolated mountain straddling the Kenya/Uganda border at ION, 34?30'E, with a peak at 43oom. Its avifauna is well-known (see especially Granvik 1923, 1934). The Kimilili track is motorable to above 3500m, traversing one of the widest parts of the mountain. This southern slope is comparable in extent with the northern slope in Uganda, but the eastern and western slopes are far steeper. In climbing from 2400 to 3500m one covers about 25 Ion.