Most East African urban areas have a limited understanding of the bird species that make their nests there. Breeding bird species in the Mwalimu Nyerere Campus thicket fragments at the University of Dar es Salaam in Dar es Salaam, Tanzania, were studied. The number and variety of bird species that make their nests in the thickets were analysed to see how their numbers and ranges were affected by habitat fragmentation. Breeding bird nests in the splintered thickets were physically searched on a regular basis. Vegetation, bare ground, cavities, stream (river) banks, and other potential nesting locations were inspected along transects to look for active nests. Most nesting birds appear to avoid smaller fragments, and the majority of nesting bird species may be negatively impacted by habitat size reductions, as the number and variety of species nesting there increased with fragment size.It is recommended that the remaining pieces of campus thicket be protected to ensure the survival of the campus' bird population.