DistributionRead full entry
This species occupies a fairly restricted geographical distribution in moist, warm, tropical areas along the eastern escarpment from northern Tanzania to southern Malawi (Josso and Prevost 2000), although its extent of occurrence exceeds 400,000 km2. The type locality of the species and one subspecies is at the extreme northern limits of its range at Taveta, just over the Tanzanian border in southern Kenya (Josso and Prevost 2000). This subspecies has been recorded predominantly on the north east coast and on isolated mountain blocks along the mountains of the Eastern Arc and southern rift in Tanzania. The other subspecies (D. thomsoni malawiensis) is centred on highland blocks in Malawi (Josso and Prevost 2000). Some of the patchiness is probably an artefact of forest fragmentation. However, taking the reduction of forest cover within the species' habitat mosaic into account (WWF Wildfinder 2012), the area of occupancy has been estimated as approximately 7,500 km2.